1944 airports with IATA codes
| IATA | ICAO | Airport Name | City | Type |
|---|---|---|---|---|
| ABQ | KABQ | Albuquerque International Sunport | Albuquerque | Large Airport |
| ALB | KALB | Albany International Airport | Albany | Large Airport |
| ANC | PANC | Ted Stevens Anchorage International Airport | Anchorage | Large Airport |
| ATL | KATL | Hartsfield Jackson Atlanta International Airport | Atlanta | Large Airport |
| AUS | KAUS | Austin Bergstrom International Airport | Austin | Large Airport |
| BDL | KBDL | Bradley International Airport | Hartford | Large Airport |
| BHM | KBHM | Birmingham-Shuttlesworth International Airport | Birmingham | Large Airport |
| BNA | KBNA | Nashville International Airport | Nashville | Large Airport |
| BOI | KBOI | Boise Air Terminal/Gowen Field | Boise | Large Airport |
| BOS | KBOS | Boston Logan International Airport | Boston | Large Airport |
| BUF | KBUF | Buffalo Niagara International Airport | Buffalo | Large Airport |
| BUR | KBUR | Hollywood Burbank/Bob Hope Airport | Burbank | Large Airport |
| BWI | KBWI | Baltimore/Washington International Thurgood Marshall Airport | Baltimore | Large Airport |
| CHS | KCHS | Charleston International Airport | Charleston | Large Airport |
| CLE | KCLE | Cleveland Hopkins International Airport | Cleveland | Large Airport |
| CLT | KCLT | Charlotte Douglas International Airport | Charlotte | Large Airport |
| CMH | KCMH | John Glenn Columbus International Airport | Columbus | Large Airport |
| COS | KCOS | City of Colorado Springs Municipal Airport | Colorado Springs | Large Airport |
| CVG | KCVG | Cincinnati Northern Kentucky International Airport | Cincinnati / Covington | Large Airport |
| DAL | KDAL | Dallas Love Field | Dallas | Large Airport |
| DCA | KDCA | Ronald Reagan Washington National Airport | Washington | Large Airport |
| DEN | KDEN | Denver International Airport | Denver | Large Airport |
| DFW | KDFW | Dallas Fort Worth International Airport | Dallas-Fort Worth | Large Airport |
| DSM | KDSM | Des Moines International Airport | Des Moines | Large Airport |
| DTW | KDTW | Detroit Metropolitan Wayne County Airport | Detroit | Large Airport |
| ELP | KELP | El Paso International Airport | El Paso | Large Airport |
| EWR | KEWR | Newark Liberty International Airport | Newark | Large Airport |
| FAT | KFAT | Fresno Yosemite International Airport | Fresno | Large Airport |
| FLL | KFLL | Fort Lauderdale Hollywood International Airport | Fort Lauderdale | Large Airport |
| GEG | KGEG | Spokane International Airport | Spokane | Large Airport |
| GRR | KGRR | Gerald R. Ford International Airport | Grand Rapids | Large Airport |
| GSO | KGSO | Piedmont Triad International Airport | Greensboro | Large Airport |
| HNL | PHNL | Daniel K. Inouye International Airport | Honolulu, Oahu | Large Airport |
| HOU | KHOU | William P. Hobby Airport | Houston | Large Airport |
| IAD | KIAD | Washington Dulles International Airport | Dulles | Large Airport |
| IAH | KIAH | George Bush Intercontinental Airport | Houston | Large Airport |
| IND | KIND | Indianapolis International Airport | Indianapolis | Large Airport |
| JAX | KJAX | Jacksonville International Airport | Jacksonville | Large Airport |
| JFK | KJFK | John F. Kennedy International Airport | New York | Large Airport |
| KOA | PHKO | Ellison Onizuka Kona International Airport at Keāhole | Kailua-Kona | Large Airport |
| LAS | KLAS | Harry Reid International Airport | Las Vegas | Large Airport |
| LAX | KLAX | Los Angeles International Airport | Los Angeles | Large Airport |
| LGA | KLGA | LaGuardia Airport | New York | Large Airport |
| LGB | KLGB | Long Beach International Airport | Long Beach | Large Airport |
| LIH | PHLI | Lihue Airport | Lihue, Kauai | Large Airport |
| MCI | KMCI | Kansas City International Airport | Kansas City | Large Airport |
| MCO | KMCO | Orlando International Airport | Orlando | Large Airport |
| MDW | KMDW | Chicago Midway International Airport | Chicago | Large Airport |
| MEM | KMEM | Memphis International Airport | Memphis | Large Airport |
| MIA | KMIA | Miami International Airport | Miami | Large Airport |
| MKE | KMKE | General Mitchell International Airport | Milwaukee | Large Airport |
| MSP | KMSP | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | Minneapolis | Large Airport |
| MSY | KMSY | Louis Armstrong New Orleans International Airport | New Orleans | Large Airport |
| MYR | KMYR | Myrtle Beach International Airport | Myrtle Beach | Large Airport |
| OAK | KOAK | San Francisco Bay Oakland International Airport | Oakland | Large Airport |
| OGG | PHOG | Kahului International Airport | Kahului | Large Airport |
| OKC | KOKC | OKC Will Rogers World Airport | Oklahoma City | Large Airport |
| OMA | KOMA | Eppley Airfield | Omaha | Large Airport |
| ONT | KONT | Ontario International Airport | Ontario | Large Airport |
| ORD | KORD | Chicago O'Hare International Airport | Chicago | Large Airport |
| ORF | KORF | Norfolk International Airport | Norfolk | Large Airport |
| PBI | KPBI | Palm Beach International Airport | West Palm Beach | Large Airport |
| PDX | KPDX | Portland International Airport | Portland | Large Airport |
| PHL | KPHL | Philadelphia International Airport | Philadelphia | Large Airport |
| PHX | KPHX | Phoenix Sky Harbor International Airport | Phoenix | Large Airport |
| PIE | KPIE | St. Petersburg Clearwater International Airport | Pinellas Park | Large Airport |
| PIT | KPIT | Pittsburgh International Airport | Pittsburgh | Large Airport |
| PNS | KPNS | Pensacola International Airport | Pensacola | Large Airport |
| PSP | KPSP | Palm Springs International Airport | Palm Springs | Large Airport |
| PVD | KPVD | Rhode Island T. F. Green International Airport | Providence/Warwick | Large Airport |
| PWM | KPWM | Portland International Jetport | Portland | Large Airport |
| RDU | KRDU | Raleigh-Durham International Airport | Raleigh/Durham | Large Airport |
| RIC | KRIC | Richmond International Airport | Richmond | Large Airport |
| RNO | KRNO | Reno Tahoe International Airport | Reno | Large Airport |
| ROC | KROC | Frederick Douglass Greater Rochester International Airport | Rochester | Large Airport |
| RSW | KRSW | Southwest Florida International Airport | Fort Myers | Large Airport |
| SAN | KSAN | San Diego International Airport | San Diego | Large Airport |
| SAT | KSAT | San Antonio International Airport | San Antonio | Large Airport |
| SAV | KSAV | Savannah Hilton Head International Airport | Savannah | Large Airport |
| SBD | KSBD | San Bernardino International Airport | San Bernardino | Large Airport |
| SDF | KSDF | Louisville Muhammad Ali International Airport | Louisville | Large Airport |
| SEA | KSEA | Seattle–Tacoma International Airport | Seattle | Large Airport |
| SFB | KSFB | Orlando Sanford International Airport | Orlando | Large Airport |
| SFO | KSFO | San Francisco International Airport | San Francisco | Large Airport |
| SJC | KSJC | Norman Y. Mineta San Jose International Airport | San Jose | Large Airport |
| SLC | KSLC | Salt Lake City International Airport | Salt Lake City | Large Airport |
| SMF | KSMF | Sacramento International Airport | Sacramento | Large Airport |
| SNA | KSNA | John Wayne Orange County International Airport | Santa Ana | Large Airport |
| SRQ | KSRQ | Sarasota Bradenton International Airport | Sarasota/Bradenton | Large Airport |
| STL | KSTL | St. Louis Lambert International Airport | St Louis | Large Airport |
| SYR | KSYR | Syracuse Hancock International Airport | Syracuse | Large Airport |
| TPA | KTPA | Tampa International Airport | Tampa | Large Airport |
| TUL | KTUL | Tulsa International Airport | Tulsa | Large Airport |
| TUS | KTUS | Tucson International Airport | Tucson | Large Airport |
| TYS | KTYS | McGhee Tyson Airport | Knoxville/Maryville | Large Airport |
| ABE | KABE | Lehigh Valley International Airport | Allentown/Bethlehem | Medium Airport |
| ABI | KABI | Abilene Regional Airport | Abilene | Medium Airport |
| ABL | PAFM | Ambler Airport | Ambler | Medium Airport |
| ABR | KABR | Aberdeen Regional Airport | Aberdeen | Medium Airport |
| ABY | KABY | Southwest Georgia Regional Airport | Albany | Medium Airport |
| ACK | KACK | Nantucket Memorial Airport | Nantucket | Medium Airport |
| ACT | KACT | Waco Regional Airport | Waco | Medium Airport |
| ACV | KACV | California Redwood Coast-Humboldt County Airport | Arcata/Eureka | Medium Airport |
| ACY | KACY | Atlantic City International Airport | Atlantic City | Medium Airport |
| ADK | PADK | Adak Airport | Adak | Medium Airport |
| ADQ | PADQ | Kodiak Airport | Kodiak | Medium Airport |
| ADT | KADH | Ada Regional Airport | Ada | Medium Airport |
| ADW | KADW | Joint Base Andrews | Camp Springs | Medium Airport |
| AEX | KAEX | Alexandria International Airport | Alexandria | Medium Airport |
| AFW | KAFW | Perot Field/Fort Worth Alliance Airport | Fort Worth | Medium Airport |
| AGC | KAGC | Allegheny County Airport | Pittsburgh | Medium Airport |
| AGS | KAGS | Augusta Regional At Bush Field | Augusta | Medium Airport |
| AHN | KAHN | Athens Ben Epps Airport | Athens | Medium Airport |
| AIA | KAIA | Alliance Municipal Airport | Alliance | Medium Airport |
| AIN | PAWI | Wainwright Airport | Wainwright | Medium Airport |
| AKC | KAKR | Akron Fulton International Airport | Akron | Medium Airport |
| AKN | PAKN | King Salmon Airport | King Salmon | Medium Airport |
| AKP | PAKP | Anaktuvuk Pass Airport | Anaktuvuk Pass | Medium Airport |
| ALI | KALI | Alice International Airport | Alice | Medium Airport |
| ALM | KALM | Alamogordo White Sands Regional Airport | Alamogordo | Medium Airport |
| ALN | KALN | St Louis Regional Airport | Alton/St Louis | Medium Airport |
| ALO | KALO | Waterloo Regional Airport | Waterloo | Medium Airport |
| ALS | KALS | San Luis Valley Regional Airport/Bergman Field | Alamosa | Medium Airport |
| ALW | KALW | Walla Walla Regional Airport | Walla Walla | Medium Airport |
| AMA | KAMA | Rick Husband Amarillo International Airport | Amarillo | Medium Airport |
| ANB | KANB | Anniston Regional Airport | Anniston | Medium Airport |
| AND | KAND | Anderson Regional Airport | Anderson | Medium Airport |
| ANI | PANI | Aniak Airport | Aniak | Medium Airport |
| ANN | PANT | Annette Island Airport | Metlakatla | Medium Airport |
| ANV | PANV | Anvik Airport | Anvik | Medium Airport |
| AOO | KAOO | Altoona Blair County Airport | Altoona | Medium Airport |
| APA | KAPA | Centennial Airport | Denver | Medium Airport |
| APF | KAPF | Naples Municipal Airport | Naples | Medium Airport |
| APG | KAPG | Phillips Army Air Field | Aberdeen | Medium Airport |
| APN | KAPN | Alpena County Regional Airport | Alpena | Medium Airport |
| ARA | KARA | Acadiana Regional Airport | New Iberia | Medium Airport |
| ARC | PARC | Arctic Village Airport | Arctic Village | Medium Airport |
| ART | KART | Watertown International Airport | Watertown | Medium Airport |
| ASE | KASE | Aspen-Pitkin County Airport (Sardy Field) | Aspen | Medium Airport |
| AST | KAST | Astoria Regional Airport | Astoria | Medium Airport |
| ATK | PATQ | Atqasuk Edward Burnell Sr Memorial Airport | Atqasuk | Medium Airport |
| ATW | KATW | Appleton International Airport | Appleton | Medium Airport |
| ATY | KATY | Watertown Regional Airport | Watertown | Medium Airport |
| AUG | KAUG | Augusta State Airport | Augusta | Medium Airport |
| AUW | KAUW | Wausau Downtown Airport | Wausau | Medium Airport |
| AVL | KAVL | Asheville Regional Airport | Asheville | Medium Airport |
| AVP | KAVP | Wilkes-Barre/Scranton International Airport | Wilkes-Barre/Scranton | Medium Airport |
| AXN | KAXN | Chandler Field | Alexandria | Medium Airport |
| AZA | KIWA | Mesa Gateway Airport | Mesa | Medium Airport |
| AZO | KAZO | Kalamazoo/Battle Creek International Airport | Kalamazoo | Medium Airport |
| BAB | KBAB | Beale Air Force Base | Beale Air Force Base | Medium Airport |
| BAD | KBAD | Barksdale Air Force Base | Bossier City | Medium Airport |
| BAF | KBAF | Westfield-Barnes Regional Airport | Westfield | Medium Airport |
| BBD | KBBD | Curtis Field | Brady | Medium Airport |
| BCE | KBCE | Bryce Canyon Airport | Bryce Canyon | Medium Airport |
| BCT | KBCT | Boca Raton Airport | Boca Raton | Medium Airport |
| BDE | KBDE | Baudette International Airport | Baudette | Medium Airport |
| BDR | KBDR | Igor I Sikorsky Memorial Airport | Bridgeport | Medium Airport |
| BED | KBED | Laurence G Hanscom Field | Bedford | Medium Airport |
| BET | PABE | Bethel Airport | Bethel | Medium Airport |
| BFD | KBFD | Bradford Regional Airport | Bradford | Medium Airport |
| BFF | KBFF | Western Neb. Rgnl/William B. Heilig Airport | Scottsbluff | Medium Airport |
| BFI | KBFI | King County International Airport - Boeing Field | Seattle | Medium Airport |
| BFK | KBKF | Buckley Space Force Base | Aurora | Medium Airport |
| BFL | KBFL | Meadows Field | Bakersfield | Medium Airport |
| BFM | KBFM | Mobile Downtown Airport | Mobile | Medium Airport |
| BFP | KBVI | Beaver County Airport | Beaver Falls | Medium Airport |
| BGM | KBGM | Greater Binghamton/Edwin A Link field | Binghamton | Medium Airport |
| BGR | KBGR | Bangor International Airport | Bangor | Medium Airport |
| BHB | KBHB | Hancock County-Bar Harbor Airport | Bar Harbor | Medium Airport |
| BIF | KBIF | Biggs Army Air Field (Fort Bliss) | Fort Bliss/El Paso | Medium Airport |
| BIG | PABI | Allen Army Airfield | Delta Junction Ft Greely | Medium Airport |
| BIH | KBIH | Eastern Sierra Regional Airport | Bishop | Medium Airport |
| BIL | KBIL | Billings Logan International Airport | Billings | Medium Airport |
| BIS | KBIS | Bismarck Municipal Airport | Bismarck | Medium Airport |
| BIX | KBIX | Keesler Air Force Base | Biloxi | Medium Airport |
| BJC | KBJC | Rocky Mountain Metropolitan Airport | Denver | Medium Airport |
| BJI | KBJI | Bemidji Regional Airport | Bemidji | Medium Airport |
| BKE | KBKE | Baker City Municipal Airport | Baker City | Medium Airport |
| BKG | KBBG | Branson Airport | Branson | Medium Airport |
| BKH | PHBK | Barking Sands Airport | Kekaha | Medium Airport |
| BKL | KBKL | Burke Lakefront Airport | Cleveland | Medium Airport |
| BKW | KBKW | Raleigh County Memorial Airport | Beaver | Medium Airport |
| BLD | Boulder City Municipal Airport | Boulder City | Medium Airport | |
| BLF | KBLF | Mercer County Airport | Bluefield | Medium Airport |
| BLH | KBLH | Blythe Airport | Blythe | Medium Airport |
| BLI | KBLI | Bellingham International Airport | Bellingham | Medium Airport |
| BLV | KBLV | Scott AFB/Midamerica Airport | Belleville | Medium Airport |
| BMG | KBMG | Monroe County Airport | Bloomington | Medium Airport |
| BMI | KBMI | Central Illinois Regional Airport at Bloomington-Normal | Bloomington/Normal | Medium Airport |
| BNO | KBNO | Burns Municipal Airport | Burns | Medium Airport |
| BPI | KBPI | Miley Memorial Field | Big Piney | Medium Airport |
| BPT | KBPT | Jack Brooks Regional Airport | Beaumont/Port Arthur | Medium Airport |
| BQK | KBQK | Brunswick Golden Isles Airport | Brunswick | Medium Airport |
| BRD | KBRD | Brainerd Lakes Regional Airport | Brainerd | Medium Airport |
| BRL | KBRL | Southeast Iowa Regional Airport | Burlington | Medium Airport |
| BRO | KBRO | Brownsville South Padre Island International Airport | Brownsville | Medium Airport |
| BRW | PABR | Wiley Post Will Rogers Memorial Airport | Utqiaġvik | Medium Airport |
| BTI | PABA | Barter Island Long Range Radar Station Airport | Barter Island | Medium Airport |
| BTL | KBTL | Battle Creek Executive Airport at Kellogg Field | Battle Creek | Medium Airport |
| BTM | KBTM | Bert Mooney Airport | Butte | Medium Airport |
| BTR | KBTR | Baton Rouge Metropolitan Airport | Baton Rouge | Medium Airport |
| BTV | KBTV | Patrick Leahy Burlington International Airport | Burlington | Medium Airport |
| BVY | KBVY | Beverly Regional Airport | Beverly / Danvers | Medium Airport |
| BWG | KBWG | Bowling Green Warren County Regional Airport | Bowling Green | Medium Airport |
| BYH | KBYH | Arkansas International Airport | Blytheville | Medium Airport |
| BYI | KBYI | Burley Municipal Airport | Burley | Medium Airport |
| BYS | KBYS | Bicycle Lake Army Air Field | Fort Irwin/Barstow | Medium Airport |
| BZN | KBZN | Bozeman Yellowstone International Airport | Bozeman | Medium Airport |
| CAE | KCAE | Columbia Metropolitan Airport | Columbia | Medium Airport |
| CAK | KCAK | Akron Canton Regional Airport | Akron | Medium Airport |
| CAR | KCAR | Caribou Municipal Airport | Caribou | Medium Airport |
| CBM | KCBM | Columbus Air Force Base | Columbus | Medium Airport |
| CCR | KCCR | Buchanan Field | Concord | Medium Airport |
| CCY | KCCY | Northeast Iowa Regional Airport | Charles City | Medium Airport |
| CDB | PACD | Cold Bay Airport | Cold Bay | Medium Airport |
| CDC | KCDC | Cedar City Regional Airport | Cedar City | Medium Airport |
| CDR | KCDR | Chadron Municipal Airport | Chadron | Medium Airport |
| CDS | KCDS | Childress Municipal Airport | Childress | Medium Airport |
| CDV | PACV | Merle K (Mudhole) Smith Airport | Cordova | Medium Airport |
| CEC | KCEC | Jack Mc Namara Field Airport | Crescent City | Medium Airport |
| CEF | Westover Metropolitan Airport / Westover Air Reserve Base | Chicopee | Medium Airport | |
| CEW | KCEW | Bob Sikes Airport | Crestview | Medium Airport |
| CEZ | KCEZ | Cortez Municipal Airport | Cortez | Medium Airport |
| CGF | KCGF | Cuyahoga County Airport | Cleveland | Medium Airport |
| CGI | KCGI | Cape Girardeau Regional Airport | Cape Girardeau | Medium Airport |
| CHA | KCHA | Chattanooga Metropolitan Airport (Lovell Field) | Chattanooga | Medium Airport |
| CHO | KCHO | Charlottesville Albemarle Airport | Charlottesville | Medium Airport |
| CID | KCID | The Eastern Iowa Airport | Cedar Rapids | Medium Airport |
| CIU | KCIU | Chippewa County International Airport | Kincheloe | Medium Airport |
| CKB | KCKB | North Central West Virginia Airport | Bridgeport | Medium Airport |
| CLD | KCRQ | McClellan-Palomar Airport | Carlsbad | Medium Airport |
| CLL | KCLL | Easterwood Field | College Station | Medium Airport |
| CLM | KCLM | William R Fairchild International Airport | Port Angeles | Medium Airport |
| CLU | KBAK | Columbus Municipal Airport | Columbus | Medium Airport |
| CMI | KCMI | University of Illinois Willard Airport | Savoy | Medium Airport |
| CMX | KCMX | Houghton County Memorial Airport | Hancock | Medium Airport |
| CNM | KCNM | Cavern City Air Terminal | Carlsbad | Medium Airport |
| CNU | KCNU | Chanute Martin Johnson Airport | Chanute | Medium Airport |
| CNY | KCNY | Canyonlands Regional Airport | Moab | Medium Airport |
| COD | KCOD | Yellowstone Regional Airport | Cody | Medium Airport |
| COE | KCOE | Coeur D'Alene Airport - Pappy Boyington Field | Coeur d'Alene | Medium Airport |
| COF | KCOF | Patrick Space Force Base | Cocoa Beach | Medium Airport |
| CON | KCON | Concord Municipal Airport | Concord | Medium Airport |
| COU | KCOU | Columbia Regional Airport | Columbia | Medium Airport |
| CPR | KCPR | Casper-Natrona County International Airport | Casper | Medium Airport |
| CRE | KCRE | Grand Strand Airport | North Myrtle Beach | Medium Airport |
| CRG | KCRG | Jacksonville Executive at Craig Airport | Jacksonville | Medium Airport |
| CRP | KCRP | Corpus Christi International Airport | Corpus Christi | Medium Airport |
| CRW | KCRW | Yeager Airport | Charleston | Medium Airport |
| CSG | KCSG | Columbus Airport | Columbus | Medium Airport |
| CSN | KCXP | Carson Airport | Carson City | Medium Airport |
| CSV | KCSV | Crossville Memorial Airport Whitson Field | Crossville | Medium Airport |
| CTB | KCTB | Cut Bank International Airport | Cut Bank | Medium Airport |
| CUB | KCUB | Jim Hamilton L.B. Owens Airport | Columbia | Medium Airport |
| CVN | KCVN | Clovis Municipal Airport | Clovis | Medium Airport |
| CVO | KCVO | Corvallis Municipal Airport | Corvallis | Medium Airport |
| CVS | KCVS | Cannon Air Force Base | Clovis | Medium Airport |
| CWA | KCWA | Central Wisconsin Airport | Mosinee | Medium Airport |
| CXO | KCXO | Conroe-North Houston Regional Airport | Houston | Medium Airport |
| CYS | KCYS | Cheyenne Regional Jerry Olson Field | Cheyenne | Medium Airport |
| CZF | PACZ | Cape Romanzof LRRS Airport | Cape Romanzof | Medium Airport |
| DAA | KDAA | Davison Army Air Field | Fort Belvoir | Medium Airport |
| DAB | KDAB | Daytona Beach International Airport | Daytona Beach | Medium Airport |
| DAG | KDAG | Barstow Daggett Airport | Daggett | Medium Airport |
| DAN | KDAN | Danville Regional Airport | Danville | Medium Airport |
| DAY | KDAY | James M. Cox Dayton International Airport | Dayton | Medium Airport |
| DBQ | KDBQ | Dubuque Regional Airport | Dubuque | Medium Airport |
| DDC | KDDC | Dodge City Regional Airport | Dodge City | Medium Airport |
| DEC | KDEC | Decatur Airport | Decatur | Medium Airport |
| DET | Coleman A. Young Municipal Airport | Detroit | Medium Airport | |
| DHN | KDHN | Dothan Regional Airport | Dothan | Medium Airport |
| DHT | KDHT | Dalhart Municipal Airport | Dalhart | Medium Airport |
| DIK | KDIK | Dickinson Theodore Roosevelt Regional Airport | Dickinson | Medium Airport |
| DLF | KDLF | Laughlin Air Force Base | Del Rio | Medium Airport |
| DLG | PADL | Dillingham Airport | Dillingham | Medium Airport |
| DLH | KDLH | Duluth International Airport | Duluth | Medium Airport |
| DLS | KDLS | Columbia Gorge Regional Airport | Dallesport / The Dalles | Medium Airport |
| DMA | KDMA | Davis Monthan Air Force Base | Tucson | Medium Airport |
| DMN | KDMN | Deming Municipal Airport | Deming | Medium Airport |
| DNL | KDNL | Daniel Field | Augusta | Medium Airport |
| DOV | KDOV | Dover Civil Air Terminal/Dover Air Force Base | Dover | Medium Airport |
| DPA | KDPA | Dupage Airport | Chicago/West Chicago | Medium Airport |
| DRA | KDRA | Desert Rock Airport | Mercury | Medium Airport |
| DRG | PADE | Deering Airport | Deering | Medium Airport |
| DRI | KDRI | Beauregard Regional Airport | DeRidder | Medium Airport |
| DRO | KDRO | Durango La Plata County Airport | Durango | Medium Airport |
| DRT | KDRT | Del Rio International Airport | Del Rio | Medium Airport |
| DSI | KDTS | Destin Executive Airport | Destin | Medium Airport |
| DUA | KDUA | Durant Regional Airport - Eaker Field | Durant | Medium Airport |
| DUG | KDUG | Bisbee Douglas International Airport | Douglas Bisbee | Medium Airport |
| DUJ | KDUJ | DuBois Regional Airport | Dubois | Medium Airport |
| DUT | PADU | Tom Madsen (Dutch Harbor) Airport | Unalaska | Medium Airport |
| DVL | KDVL | Devils Lake Regional Airport | Devils Lake | Medium Airport |
| DXR | KDXR | Danbury Municipal Airport | Danbury | Medium Airport |
| DYS | KDYS | Dyess Air Force Base | Abilene | Medium Airport |
| EAR | KEAR | Kearney Regional Airport | Kearney | Medium Airport |
| EAT | KEAT | Pangborn Memorial Airport | Wenatchee | Medium Airport |
| EAU | KEAU | Chippewa Valley Regional Airport | Eau Claire | Medium Airport |
| ECG | KECG | Elizabeth City Regional Airport & Coast Guard Air Station | Elizabeth City | Medium Airport |
| ECP | KECP | Northwest Florida Beaches International Airport | Panama City Beach | Medium Airport |
| EDF | PAED | Elmendorf Air Force Base | Anchorage | Medium Airport |
| EDW | KEDW | Edwards Air Force Base | Edwards | Medium Airport |
| EED | KEED | Needles Airport | Needles | Medium Airport |
| EEN | KEEN | Dillant Hopkins Airport | Keene | Medium Airport |
| EFD | KEFD | Ellington Airport | Houston | Medium Airport |
| EGE | KEGE | Eagle County Regional Airport | Eagle | Medium Airport |
| EGI | KEGI | Duke Field | Crestview | Medium Airport |
| EGX | PAII | Egegik Airport | Egegik | Medium Airport |
| EHM | PAEH | Cape Newenham LRRS Airport | Cape Newenham | Medium Airport |
| EIL | PAEI | Eielson Air Force Base | Fairbanks | Medium Airport |
| EKA | KEKA | Murray Field | Eureka | Medium Airport |
| EKN | KEKN | Elkins-Randolph County Regional Airport | Elkins | Medium Airport |
| EKO | KEKO | Elko Regional Airport | Elko | Medium Airport |
| ELD | KELD | South Arkansas Regional Airport at Goodwin Field | El Dorado | Medium Airport |
| ELM | KELM | Elmira Corning Regional Airport | Elmira/Corning | Medium Airport |
| ELY | KELY | Ely Airport Yelland Field | Ely | Medium Airport |
| EMK | PAEM | Emmonak Airport | Emmonak | Medium Airport |
| ENA | PAEN | Kenai Municipal Airport | Kenai | Medium Airport |
| END | KEND | Vance Air Force Base | Enid | Medium Airport |
| ENN | PANN | Nenana Municipal Airport | Nenana | Medium Airport |
| ENV | KENV | Wendover Airport | Wendover | Medium Airport |
| ENW | KENW | Kenosha Regional Airport | Kenosha | Medium Airport |
| ERI | KERI | Erie International Tom Ridge Field | Erie | Medium Airport |
| ESC | KESC | Delta County Airport | Escanaba | Medium Airport |
| ESD | KORS | Orcas Island Airport | Eastsound | Medium Airport |
| ESF | KESF | Esler Army Airfield / Esler Regional Airport | Alexandria | Medium Airport |
| EUG | KEUG | Eugene Airport | Eugene | Medium Airport |
| EVV | KEVV | Evansville Regional Airport | Evansville | Medium Airport |
| EVW | KEVW | Evanston-Uinta County Airport-Burns Field | Evanston | Medium Airport |
| EWB | KEWB | New Bedford Regional Airport | New Bedford | Medium Airport |
| EWN | KEWN | Coastal Carolina Regional Airport | New Bern | Medium Airport |
| EYW | KEYW | Key West International Airport | Key West | Medium Airport |
| FAF | KFAF | Felker Army Air Field | Newport News (Fort Eustis) | Medium Airport |
| FAI | PAFA | Fairbanks International Airport | Fairbanks | Medium Airport |
| FAR | KFAR | Hector International Airport | Fargo | Medium Airport |
| FAY | KFAY | Fayetteville Regional Airport - Grannis Field | Fayetteville | Medium Airport |
| FBG | KFBG | Simmons Army Air Field | Fort Bragg | Medium Airport |
| FBK | PAFB | Ladd Army Airfield | Fairbanks | Medium Airport |
| FCA | KGPI | Glacier Park International Airport | Kalispell | Medium Airport |
| FCS | KFCS | Butts AAF (Fort Carson) Air Field | Fort Carson | Medium Airport |
| FDY | KFDY | Findlay Airport | Findlay | Medium Airport |
| FFO | KFFO | Wright-Patterson Air Force Base | Dayton | Medium Airport |
| FHU | KFHU | Sierra Vista Municipal Airport / Libby Army Air Field | Fort Huachuca / Sierra Vista | Medium Airport |
| FKL | KFKL | Venango Regional Airport | Franklin | Medium Airport |
| FLG | KFLG | Flagstaff Pulliam Airport | Flagstaff | Medium Airport |
| FLO | KFLO | Florence Regional Airport | Florence | Medium Airport |
| FME | KFME | Fort Meade Executive Airport | Fort Meade(Odenton) | Medium Airport |
| FMN | KFMN | Four Corners Regional Airport | Farmington | Medium Airport |
| FMY | KFMY | Page Field | Fort Myers | Medium Airport |
| FNL | KFNL | Northern Colorado Regional Airport | Loveland | Medium Airport |
| FNT | KFNT | Bishop International Airport | Flint | Medium Airport |
| FOD | KFOD | Fort Dodge Regional Airport | Fort Dodge | Medium Airport |
| FOE | KFOE | Topeka Regional Airport | Topeka | Medium Airport |
| FPR | KFPR | Treasure Coast International Airport | Fort Pierce | Medium Airport |
| FRD | KFHR | Friday Harbor Airport | Friday Harbor | Medium Airport |
| FRG | KFRG | Republic Airport | East Farmingdale | Medium Airport |
| FRI | KFRI | Marshall Army Air Field | Fort Riley (Junction City) | Medium Airport |
| FSD | KFSD | Sioux Falls Regional Airport | Sioux Falls | Medium Airport |
| FSI | KFSI | Henry Post Army Air Field | Fort Sill | Medium Airport |
| FSM | KFSM | Fort Smith Regional Airport | Fort Smith | Medium Airport |
| FST | KFST | Fort Stockton Pecos County Airport | Fort Stockton | Medium Airport |
| FTK | KFTK | Godman Army Air Field | Fort Knox | Medium Airport |
| FTW | KFTW | Fort Worth Meacham International Airport | Fort Worth | Medium Airport |
| FTY | KFTY | Fulton County Airport Brown Field | Atlanta | Medium Airport |
| FWA | KFWA | Fort Wayne International Airport | Fort Wayne | Medium Airport |
| FWH | KNFW | NAS Fort Worth JRB / Carswell Field | Fort Worth | Medium Airport |
| FXE | KFXE | Fort Lauderdale Executive Airport | Fort Lauderdale | Medium Airport |
| FYU | PFYU | Fort Yukon Airport | Fort Yukon | Medium Airport |
| FYV | KFYV | Drake Field | Fayetteville | Medium Airport |
| GAL | PAGA | Edward G. Pitka Sr Airport | Galena | Medium Airport |
| GAM | PAGM | Gambell Airport | Gambell | Medium Airport |
| GCC | KGCC | Northeast Wyoming Regional Airport | Gillette | Medium Airport |
| GCK | KGCK | Garden City Regional Airport | Garden City | Medium Airport |
| GCN | KGCN | Grand Canyon National Park Airport | Grand Canyon - Tusayan | Medium Airport |
| GDV | KGDV | Dawson Community Airport | Glendive | Medium Airport |
| GFK | KGFK | Grand Forks International Airport | Grand Forks | Medium Airport |
| GFL | KGFL | Floyd Bennett Memorial Airport | Glens Falls | Medium Airport |
| GGG | KGGG | East Texas Regional Airport | Longview | Medium Airport |
| GGW | KGGW | Glasgow Valley County Airport Wokal Field | Glasgow | Medium Airport |
| GJT | KGJT | Grand Junction Regional Airport | Grand Junction | Medium Airport |
| GKN | PAGK | Gulkana Airport | Gulkana | Medium Airport |
| GLD | KGLD | Goodland Municipal Airport | Goodland | Medium Airport |
| GLH | KGLH | Mid Delta Regional Airport | Greenville | Medium Airport |
| GLS | KGLS | Scholes International At Galveston Airport | Galveston | Medium Airport |
| GMU | KGMU | Greenville Downtown Airport | Greenville | Medium Airport |
| GNV | KGNV | Gainesville Regional Airport | Gainesville | Medium Airport |
| GON | KGON | Groton New London Airport | Groton | Medium Airport |
| GPT | KGPT | Gulfport Biloxi International Airport | Gulfport | Medium Airport |
| GRB | KGRB | Austin Straubel International Airport | Green Bay | Medium Airport |
| GRF | KGRF | Gray Army Air Field | Fort Lewis/Tacoma | Medium Airport |
| GRI | KGRI | Central Nebraska Regional Airport | Grand Island | Medium Airport |
| GRK | KGRK | Killeen Regional Airport / Robert Gray Army Airfield | Fort Cavazos | Medium Airport |
| GSB | KGSB | Seymour Johnson Air Force Base | Goldsboro | Medium Airport |
| GSP | KGSP | Greenville-Spartanburg International Airport | Greenville/Greer/Spartanburg | Medium Airport |
| GST | PAGS | Gustavus Airport | Gustavus | Medium Airport |
| GTF | KGTF | Great Falls International Airport | Great Falls | Medium Airport |
| GTR | KGTR | Golden Triangle Regional Airport | Columbus/W Point/Starkville | Medium Airport |
| GUC | KGUC | Gunnison Crested Butte Regional Airport | Gunnison | Medium Airport |
| GUP | KGUP | Gallup Municipal Airport | Gallup | Medium Airport |
| GUS | KGUS | Grissom Air Reserve Base | Peru | Medium Airport |
| GUY | KGUY | Guymon Municipal Airport | Guymon | Medium Airport |
| GWO | KGWO | Greenwood–Leflore Airport | Greenwood | Medium Airport |
| GYY | Gary/Chicago International Airport | Gary | Medium Airport | |
| HBG | KHBG | Hattiesburg Bobby L Chain Municipal Airport | Hattiesburg | Medium Airport |
| HBR | KHBR | Hobart Regional Airport | Hobart | Medium Airport |
| HCR | PAHC | Holy Cross Airport | Holy Cross | Medium Airport |
| HDN | KHDN | Yampa Valley Airport | Hayden | Medium Airport |
| HFD | KHFD | Hartford Brainard Airport | Hartford | Medium Airport |
| HGR | KHGR | Hagerstown Regional Richard A Henson Field | Hagerstown | Medium Airport |
| HHH | KHXD | Hilton Head Airport | Hilton Head Island | Medium Airport |
| HHR | KHHR | Jack Northrop Field Hawthorne Municipal Airport | Hawthorne | Medium Airport |
| HIB | KHIB | Range Regional Airport | Hibbing | Medium Airport |
| HIF | KHIF | Hill Air Force Base | Ogden | Medium Airport |
| HII | KHII | Lake Havasu City Airport | Lake Havasu City | Medium Airport |
| HIO | KHIO | Portland Hillsboro Airport | Portland | Medium Airport |
| HKY | KHKY | Hickory Regional Airport | Hickory | Medium Airport |
| HLG | KHLG | Wheeling Ohio County Airport | Wheeling | Medium Airport |
| HLN | KHLN | Helena Regional Airport | Helena | Medium Airport |
| HMN | KHMN | Holloman Air Force Base | Alamogordo | Medium Airport |
| HNM | PHHN | Hana Airport | Hana | Medium Airport |
| HNS | PAHN | Haines Airport | Haines | Medium Airport |
| HOB | KHOB | Lea County Regional Airport | Hobbs | Medium Airport |
| HOM | PAHO | Homer Airport | Homer | Medium Airport |
| HON | KHON | Huron Regional Airport | Huron | Medium Airport |
| HOP | KHOP | Campbell Army Airfield (Fort Campbell) | Fort Campbell | Medium Airport |
| HOT | KHOT | Memorial Field Airport | Hot Springs | Medium Airport |
| HPN | KHPN | Westchester County Airport | White Plains | Medium Airport |
| HQM | KHQM | Bowerman Airport | Hoquiam | Medium Airport |
| HRL | KHRL | Valley International Airport | Harlingen | Medium Airport |
| HRO | KHRO | Boone County Airport | Harrison | Medium Airport |
| HSL | PAHL | Huslia Airport | Huslia | Medium Airport |
| HST | KHST | Homestead Air Reserve Base | Homestead | Medium Airport |
| HSV | KHSV | Huntsville International Airport | Huntsville | Medium Airport |
| HTS | KHTS | Tri-State Airport / Milton J. Ferguson Field | Huntington | Medium Airport |
| HTV | KUTS | Huntsville Regional Airport | Huntsville | Medium Airport |
| HUA | KHUA | Redstone Army Air Field | Redstone Arsnl Huntsville | Medium Airport |
| HUF | Terre Haute Regional Airport, Hulman Field | Terre Haute | Medium Airport | |
| HUL | KHUL | Houlton International Airport | Houlton | Medium Airport |
| HUT | KHUT | Hutchinson Municipal Airport | Hutchinson | Medium Airport |
| HVN | KHVN | Tweed New Haven Airport | New Haven | Medium Airport |
| HVR | KHVR | Havre City County Airport | Havre | Medium Airport |
| HWO | KHWO | North Perry Airport | Hollywood | Medium Airport |
| HYA | KHYA | Cape Cod Gateway Airport | Hyannis | Medium Airport |
| HYR | KHYR | Sawyer County Airport | Hayward | Medium Airport |
| HYS | KHYS | Hays Regional Airport | Hays | Medium Airport |
| IAB | KIAB | McConnell Air Force Base | Wichita | Medium Airport |
| IAG | KIAG | Niagara Falls International Airport | Niagara Falls | Medium Airport |
| IAN | PAIK | Bob Baker Memorial Airport | Kiana | Medium Airport |
| ICT | KICT | Wichita Dwight D. Eisenhower National Airport | Wichita | Medium Airport |
| IDA | KIDA | Idaho Falls Regional Airport | Idaho Falls | Medium Airport |
| IFP | KIFP | Laughlin Bullhead International Airport | Bullhead City | Medium Airport |
| IGM | KIGM | Kingman Airport | Kingman | Medium Airport |
| IKK | KIKK | Greater Kankakee Airport | Kankakee | Medium Airport |
| ILG | KILG | Wilmington Airport | Wilmington | Medium Airport |
| ILI | PAIL | Iliamna Airport | Iliamna | Medium Airport |
| ILM | KILM | Wilmington International Airport | Wilmington | Medium Airport |
| ILN | KILN | Wilmington Airpark | Wilmington | Medium Airport |
| IMT | KIMT | Ford Airport | Kingsford | Medium Airport |
| INK | KINK | Winkler County Airport | Wink | Medium Airport |
| INL | KINL | Falls International Airport | International Falls | Medium Airport |
| INT | KINT | Smith Reynolds Airport | Winston Salem | Medium Airport |
| INW | KINW | Winslow Lindbergh Regional Airport | Winslow | Medium Airport |
| IPL | KIPL | Imperial County Airport | Imperial | Medium Airport |
| IPT | KIPT | Williamsport Regional Airport | Williamsport | Medium Airport |
| IRK | KIRK | Kirksville Regional Airport | Kirksville | Medium Airport |
| ISM | KISM | Kissimmee Gateway Airport | Orlando | Medium Airport |
| ISO | KISO | Kinston Regional Jetport At Stallings Field | Kinston | Medium Airport |
| ISP | KISP | Long Island MacArthur Airport | Islip | Medium Airport |
| ITH | KITH | Ithaca Tompkins Regional Airport | Ithaca | Medium Airport |
| ITO | PHTO | Hilo International Airport | Hilo | Medium Airport |
| JAC | KJAC | Jackson Hole Airport | Jackson | Medium Airport |
| JAN | KJAN | Jackson-Medgar Wiley Evers International Airport | Jackson | Medium Airport |
| JBR | KJBR | Jonesboro Municipal Airport | Jonesboro | Medium Airport |
| JCT | KJCT | Kimble County Airport | Junction | Medium Airport |
| JFN | KHZY | Northeast Ohio Regional Airport | Ashtabula | Medium Airport |
| JHM | PHJH | Kapalua Airport | Lahaina | Medium Airport |
| JHW | KJHW | Chautauqua County-Jamestown Airport | Jamestown | Medium Airport |
| JLN | KJLN | Joplin Regional Airport | Joplin | Medium Airport |
| JMS | KJMS | Jamestown Regional Airport | Jamestown | Medium Airport |
| JNU | PAJN | Juneau International Airport | Juneau | Medium Airport |
| JRF | PHJR | Kalaeloa Airport | Kapolei | Medium Airport |
| JST | KJST | John Murtha Johnstown Cambria County Airport | Johnstown | Medium Airport |
| JXN | KJXN | Jackson County Airport/Reynolds Field | Jackson | Medium Airport |
| KLS | KKLS | Southwest Washington Regional Airport | Kelso | Medium Airport |
| KLW | PAKW | Klawock Airport | Klawock | Medium Airport |
| KPC | PAPC | Port Clarence Coast Guard Station | Port Clarence | Medium Airport |
| KTN | PAKT | Ketchikan International Airport | Ketchikan | Medium Airport |
| LAA | KLAA | Southeast Colorado Regional Airport | Lamar | Medium Airport |
| LAF | KLAF | Purdue University Airport | West Lafayette | Medium Airport |
| LAL | KLAL | Lakeland Linder International Airport | Lakeland | Medium Airport |
| LAN | KLAN | Capital Region International Airport | Lansing | Medium Airport |
| LAR | KLAR | Laramie Regional Airport | Laramie | Medium Airport |
| LAW | KLAW | Lawton Fort Sill Regional Airport | Lawton | Medium Airport |
| LBB | KLBB | Lubbock Preston Smith International Airport | Lubbock | Medium Airport |
| LBE | KLBE | Arnold Palmer Regional Airport | Latrobe | Medium Airport |
| LBF | KLBF | North Platte Regional Airport Lee Bird Field | North Platte | Medium Airport |
| LBL | KLBL | Liberal Mid-America Regional Airport | Liberal | Medium Airport |
| LBT | KLBT | Lumberton Regional Airport | Lumberton | Medium Airport |
| LCH | KLCH | Lake Charles Regional Airport | Lake Charles | Medium Airport |
| LCK | KLCK | Rickenbacker International Airport | Columbus | Medium Airport |
| LEB | KLEB | Lebanon Municipal Airport | Lebanon | Medium Airport |
| LEE | KLEE | Leesburg International Airport | Leesburg | Medium Airport |
| LEX | KLEX | Blue Grass Airport | Lexington | Medium Airport |
| LFI | KLFI | Langley Air Force Base | Hampton | Medium Airport |
| LFK | KLFK | Angelina County Airport | Lufkin | Medium Airport |
| LFT | KLFT | Lafayette Regional Airport | Lafayette | Medium Airport |
| LGU | KLGU | Logan-Cache Airport | Logan | Medium Airport |
| LIT | KLIT | Bill & Hillary Clinton National Airport/Adams Field | Little Rock | Medium Airport |
| LJN | KLBX | Texas Gulf Coast Regional Airport | Angleton | Medium Airport |
| LMT | KLMT | Crater Lake-Klamath Regional Airport | Klamath Falls | Medium Airport |
| LND | KLND | Hunt Field | Lander | Medium Airport |
| LNK | KLNK | Lincoln Airport | Lincoln | Medium Airport |
| LNS | KLNS | Lancaster Airport | Lancaster | Medium Airport |
| LNY | PHNY | Lanai Airport | Lanai City | Medium Airport |
| LOL | KLOL | Derby Field | Lovelock | Medium Airport |
| LOU | KLOU | Bowman Field | Louisville | Medium Airport |
| LOZ | KLOZ | London-Corbin Airport/Magee Field | London | Medium Airport |
| LRD | KLRD | Laredo International Airport | Laredo | Medium Airport |
| LRF | KLRF | Little Rock Air Force Base | Jacksonville | Medium Airport |
| LRU | KLRU | Las Cruces International Airport | Las Cruces | Medium Airport |
| LSE | KLSE | La Crosse Regional Airport | La Crosse | Medium Airport |
| LSF | KLSF | Lawson Army Air Field | Fort Benning | Medium Airport |
| LSV | KLSV | Nellis Air Force Base | Las Vegas | Medium Airport |
| LTS | KLTS | Altus Air Force Base | Altus | Medium Airport |
| LUF | KLUF | Luke Air Force Base | Glendale | Medium Airport |
| LUK | KLUK | Cincinnati Municipal Airport Lunken Field | Cincinnati | Medium Airport |
| LUR | PALU | Cape Lisburne LRRS Airport | Cape Lisburne | Medium Airport |
| LVM | KLVM | Mission Field | Livingston | Medium Airport |
| LVS | KLVS | Las Vegas Municipal Airport | Las Vegas | Medium Airport |
| LWB | KLWB | Greenbrier Valley Airport | Lewisburg | Medium Airport |
| LWM | KLWM | Lawrence Municipal Airport | Lawrence | Medium Airport |
| LWS | KLWS | Lewiston Nez Perce County Airport | Lewiston | Medium Airport |
| LWT | KLWT | Lewistown Municipal Airport | Lewistown | Medium Airport |
| LYH | KLYH | Lynchburg Regional Airport - Preston Glenn Field | Lynchburg | Medium Airport |
| LYU | KELO | Ely Municipal Airport | Ely | Medium Airport |
| MAF | KMAF | Midland International Air and Space Port | Midland | Medium Airport |
| MBG | KMBG | Mobridge Municipal Airport | Mobridge | Medium Airport |
| MBS | KMBS | MBS International Airport | Freeland | Medium Airport |
| MCB | KMCB | McComb-Pike County Airport / John E Lewis Field | McComb | Medium Airport |
| MCC | KMCC | McClellan Airfield | Sacramento | Medium Airport |
| MCE | KMCE | Merced Regional Macready Field | Merced | Medium Airport |
| MCF | KMCF | MacDill Air Force Base | Tampa | Medium Airport |
| MCG | PAMC | McGrath Airport | McGrath | Medium Airport |
| MCK | KMCK | McCook Ben Nelson Regional Airport | McCook | Medium Airport |
| MCN | KMCN | Middle Georgia Regional Airport | Macon | Medium Airport |
| MCW | KMCW | Mason City Municipal Airport | Mason City | Medium Airport |
| MDH | KMDH | Southern Illinois Airport | Murphysboro | Medium Airport |
| MDT | KMDT | Harrisburg International Airport | Harrisburg | Medium Airport |
| MEI | KMEI | Key Field / Meridian Regional Airport | Meridian | Medium Airport |
| MER | KMER | Castle Airport | Merced | Medium Airport |
| MFD | KMFD | Mansfield Lahm Regional Airport | Mansfield | Medium Airport |
| MFE | KMFE | McAllen Miller International Airport | McAllen | Medium Airport |
| MFH | Mesquite Airport | Mesquite | Medium Airport | |
| MFR | KMFR | Rogue Valley International-Medford Airport | Medford | Medium Airport |
| MGC | KMGC | Michigan City Municipal Airport | Michigan City | Medium Airport |
| MGE | KMGE | Dobbins Air Reserve Base | Marietta | Medium Airport |
| MGM | KMGM | Montgomery Regional (Dannelly Field) Airport | Montgomery | Medium Airport |
| MGW | KMGW | Morgantown Municipal Airport Walter L. (Bill) Hart Field | Morgantown | Medium Airport |
| MHK | KMHK | Manhattan Regional Airport | Manhattan | Medium Airport |
| MHR | KMHR | Sacramento Mather Airport | Sacramento | Medium Airport |
| MHT | KMHT | Manchester-Boston Regional Airport | Manchester | Medium Airport |
| MHV | KMHV | Mojave Air & Space Port | Mojave | Medium Airport |
| MIB | KMIB | Minot Air Force Base | Minot | Medium Airport |
| MIE | KMIE | Delaware County Johnson Field | Muncie | Medium Airport |
| MIV | KMIV | Millville Municipal Airport | Millville | Medium Airport |
| MKC | KMKC | Charles B. Wheeler Downtown Airport | Kansas City | Medium Airport |
| MKG | KMKG | Muskegon County Airport | Muskegon | Medium Airport |
| MKK | PHMK | Molokai Airport | Kaunakakai | Medium Airport |
| MKL | KMKL | McKellar-Sipes Regional Airport | Jackson | Medium Airport |
| MLB | KMLB | Melbourne Orlando International Airport | Melbourne | Medium Airport |
| MLC | KMLC | Mc Alester Regional Airport | Mc Alester | Medium Airport |
| MLI | KMLI | Quad City International Airport | Moline | Medium Airport |
| MLS | KMLS | Miles City Airport - Frank Wiley Field | Miles City | Medium Airport |
| MLU | KMLU | Monroe Regional Airport | Monroe | Medium Airport |
| MMT | KMMT | Mc Entire Joint National Guard Base | Eastover | Medium Airport |
| MMU | KMMU | Morristown Municipal Airport | Morristown | Medium Airport |
| MNZ | KHEF | Manassas Regional Airport/Harry P. Davis Field | Manassas | Medium Airport |
| MOB | KMOB | Mobile Regional Airport | Mobile | Medium Airport |
| MOD | KMOD | Modesto City Co-Harry Sham Field | Modesto | Medium Airport |
| MOT | KMOT | Minot International Airport | Minot | Medium Airport |
| MPV | KMPV | Edward F Knapp State Airport | Barre/Montpelier | Medium Airport |
| MQT | KSAW | Marquette/Sawyer International Airport | Gwinn | Medium Airport |
| MQY | KMQY | Smyrna Airport | Smyrna | Medium Airport |
| MRB | KMRB | Eastern WV Regional Airport/Shepherd Field | Martinsburg | Medium Airport |
| MRI | PAMR | Merrill Field | Anchorage | Medium Airport |
| MRY | KMRY | Monterey Regional Airport | Monterey | Medium Airport |
| MSL | KMSL | Northwest Alabama Regional Airport | Muscle Shoals | Medium Airport |
| MSN | KMSN | Dane County Regional Truax Field | Madison | Medium Airport |
| MSO | KMSO | Missoula Montana Airport | Missoula | Medium Airport |
| MSS | KMSS | Massena International Airport Richards Field | Massena | Medium Airport |
| MTC | KMTC | Selfridge Air National Guard Base Airport | Mount Clemens | Medium Airport |
| MTH | KMTH | Florida Keys Marathon International Airport | Marathon | Medium Airport |
| MTJ | KMTJ | Montrose Regional Airport | Montrose | Medium Airport |
| MTN | KMTN | Martin State Airport | Baltimore | Medium Airport |
| MUE | PHMU | Waimea Kohala Airport | Waimea (Kamuela) | Medium Airport |
| MUI | KMUI | Muir Army Air Field (Fort Indiantown Gap) Airport | Fort Indiantown Gap(Annville) | Medium Airport |
| MUO | KMUO | Mountain Home Air Force Base | Mountain Home | Medium Airport |
| MWA | KMWA | Veterans Airport of Southern Illinois | Marion | Medium Airport |
| MWH | KMWH | Grant County International Airport | Moses Lake | Medium Airport |
| MWL | KMWL | Mineral Wells Regional Airport | Mineral Wells | Medium Airport |
| MXF | KMXF | Maxwell Air Force Base | Montgomery | Medium Airport |
| MYL | KMYL | McCall Municipal Airport | McCall | Medium Airport |
| MYU | PAMY | Mekoryuk Airport | Mekoryuk | Medium Airport |
| MYV | KMYV | Yuba County Airport | Marysville | Medium Airport |
| NBG | KNBG | New Orleans NAS JRB/Alvin Callender Field | New Orleans | Medium Airport |
| NCO | KOQU | Quonset State Airport | North Kingstown | Medium Airport |
| NEL | KNEL | Lakehurst Maxfield Field Airport | Lakehurst | Medium Airport |
| NEW | KNEW | Lakefront Airport | New Orleans | Medium Airport |
| NFL | KNFL | Fallon Naval Air Station | Fallon | Medium Airport |
| NGF | PHNG | Kaneohe Bay MCAS (Marion E. Carl Field) Airport | Kaneohe | Medium Airport |
| NGP | KNGP | Naval Air Station Corpus Christi Truax Field | Corpus Christi | Medium Airport |
| NGU | KNGU | Norfolk Naval Station (Chambers Field) | Norfolk | Medium Airport |
| NHK | KNHK | Patuxent River Naval Air Station (Trapnell Field) | Patuxent River | Medium Airport |
| NHZ | KBXM | Brunswick Executive Airport | Brunswick | Medium Airport |
| NIP | KNIP | Jacksonville Naval Air Station (Towers Field) | Jacksonville | Medium Airport |
| NJK | KNJK | El Centro NAF Airport (Vraciu Field) | El Centro | Medium Airport |
| NKX | KNKX | Miramar Marine Corps Air Station - Mitscher Field | San Diego | Medium Airport |
| NLC | KNLC | Lemoore Naval Air Station (Reeves Field) Airport | Lemoore | Medium Airport |
| NPA | KNPA | Naval Air Station Pensacola Forrest Sherman Field | Pensacola | Medium Airport |
| NPT | KUUU | Newport State Airport | Newport | Medium Airport |
| NQA | KNQA | Millington-Memphis Airport | Millington | Medium Airport |
| NQI | KNQI | Kingsville Naval Air Station | Kingsville | Medium Airport |
| NQX | KNQX | Naval Air Station Key West/Boca Chica Field | Key West | Medium Airport |
| NRB | KNRB | Naval Station Mayport / Admiral David L McDonald Field | Jacksonville | Medium Airport |
| NSE | KNSE | Whiting Field Naval Air Station - North | Milton | Medium Airport |
| NTD | KNTD | Point Mugu Naval Air Station (Naval Base Ventura Co) | Point Mugu | Medium Airport |
| NTU | KNTU | Oceana Naval Air Station | Virginia Beach | Medium Airport |
| NUI | PAQT | Nuiqsut Airport | Nuiqsut | Medium Airport |
| NUQ | KNUQ | Moffett Federal Airfield | Mountain View | Medium Airport |
| NUW | KNUW | Whidbey Island Naval Air Station (Ault Field) | Oak Harbor | Medium Airport |
| NYG | KNYG | Quantico Marine Corps Airfield / Turner Field | Quantico | Medium Airport |
| NZY | KNZY | North Island Naval Air Station-Halsey Field | San Diego | Medium Airport |
| OAJ | KOAJ | Albert J Ellis Airport | Richlands | Medium Airport |
| OCA | Ocean Reef Club Airport | Key Largo | Medium Airport | |
| OCE | KOXB | Ocean City Municipal Airport | Ocean City | Medium Airport |
| OCN | KOKB | Oceanside Municipal Airport | Oceanside | Medium Airport |
| OFF | KOFF | Offutt Air Force Base | Omaha | Medium Airport |
| OFK | KOFK | Karl Stefan Memorial Airport | Norfolk | Medium Airport |
| OGB | KOGB | Orangeburg Municipal Airport | Orangeburg | Medium Airport |
| OGD | KOGD | Ogden Hinckley Airport | Ogden | Medium Airport |
| OGS | KOGS | Ogdensburg International Airport | Ogdensburg | Medium Airport |
| OLF | KOLF | L M Clayton Airport | Wolf Point | Medium Airport |
| OLM | KOLM | Olympia Regional Airport | Olympia | Medium Airport |
| OLS | KOLS | Nogales International Airport | Nogales | Medium Airport |
| OLU | KOLU | Columbus Municipal Airport | Columbus | Medium Airport |
| OME | PAOM | Nome Airport | Nome | Medium Airport |
| ONO | KONO | Ontario Municipal Airport | Oregon | Medium Airport |
| ONP | KONP | Newport Municipal Airport | Newport | Medium Airport |
| OPF | KOPF | Miami-Opa Locka Executive Airport | Miami | Medium Airport |
| ORH | KORH | Worcester Regional Airport | Worcester | Medium Airport |
| ORL | KORL | Orlando Executive Airport | Orlando | Medium Airport |
| ORT | PAOR | Northway Airport | Northway | Medium Airport |
| OSH | KOSH | Wittman Regional Airport | Oshkosh | Medium Airport |
| OSU | KOSU | The Ohio State University Airport - Don Scott Field | Columbus | Medium Airport |
| OTH | KOTH | Southwest Oregon Regional Airport | North Bend | Medium Airport |
| OTM | KOTM | Ottumwa Regional Airport | Ottumwa | Medium Airport |
| OTZ | PAOT | Ralph Wien Memorial Airport | Kotzebue | Medium Airport |
| OWB | KOWB | Owensboro Daviess County Airport | Owensboro | Medium Airport |
| OWD | KOWD | Norwood Memorial Airport | Norwood | Medium Airport |
| OXR | KOXR | Oxnard Airport | Oxnard | Medium Airport |
| OZR | KOZR | Cairns AAF (Fort Rucker) Air Field | Fort Rucker/Ozark | Medium Airport |
| PAE | KPAE | Seattle Paine Field International Airport | Everett | Medium Airport |
| PAH | KPAH | Barkley Regional Airport | Paducah | Medium Airport |
| PAM | KPAM | Tyndall Air Force Base | Panama City | Medium Airport |
| PAO | KPAO | Palo Alto Airport | Palo Alto | Medium Airport |
| PAQ | PAAQ | Warren "Bud" Woods Palmer Municipal Airport | Palmer | Medium Airport |
| PBF | KPBF | Pine Bluff Regional Airport, Grider Field | Pine Bluff | Medium Airport |
| PBG | KPBG | Plattsburgh International Airport | Plattsburgh | Medium Airport |
| PDK | KPDK | DeKalb Peachtree Airport | Atlanta | Medium Airport |
| PDT | KPDT | Eastern Oregon Regional Airport at Pendleton | Pendleton | Medium Airport |
| PGA | KPGA | Page Municipal Airport | Page | Medium Airport |
| PGD | KPGD | Punta Gorda Airport | Punta Gorda | Medium Airport |
| PGV | KPGV | Pitt-Greenville Airport | Greenville | Medium Airport |
| PHF | KPHF | Newport News Williamsburg International Airport | Newport News | Medium Airport |
| PIA | KPIA | General Wayne A. Downing Peoria International Airport | Peoria | Medium Airport |
| PIB | KPIB | Hattiesburg Laurel Regional Airport | Moselle | Medium Airport |
| PIH | KPIH | Pocatello Regional Airport | Pocatello | Medium Airport |
| PIR | KPIR | Pierre Regional Airport | Pierre | Medium Airport |
| PIZ | PPIZ | Point Lay LRRS Airport | Point Lay | Medium Airport |
| PKB | KPKB | Mid Ohio Valley Regional Airport | Parkersburg (Williamstown) | Medium Airport |
| PLN | KPLN | Pellston Regional Airport of Emmet County Airport | Pellston | Medium Airport |
| PMD | KPMD | Palmdale Regional Airport / USAF Plant 42 Airport | Palmdale | Medium Airport |
| PNC | KPNC | Ponca City Regional Airport | Ponca City | Medium Airport |
| PNE | KPNE | Northeast Philadelphia Airport | Philadelphia | Medium Airport |
| PNX | KGYI | North Texas Regional Airport Perrin Field | Denison | Medium Airport |
| POB | KPOB | Pope Field | Fort Bragg | Medium Airport |
| POE | KPOE | Polk Army Air Field | Fort Polk | Medium Airport |
| POU | KPOU | Dutchess County Airport | Poughkeepsie | Medium Airport |
| PQI | KPQI | Presque Isle International Airport | Presque Isle | Medium Airport |
| PRB | KPRB | Paso Robles Municipal Airport | Paso Robles | Medium Airport |
| PRC | KPRC | Prescott Regional Airport - Ernest A. Love Field | Prescott | Medium Airport |
| PRX | KPRX | Cox Field | Paris | Medium Airport |
| PSC | KPSC | Tri Cities Airport | Pasco | Medium Airport |
| PSG | PAPG | Petersburg James A Johnson Airport | Petersburg | Medium Airport |
| PSM | KPSM | Portsmouth International Airport at Pease | Portsmouth | Medium Airport |
| PTH | PAPH | Port Heiden Airport | Port Heiden | Medium Airport |
| PTK | KPTK | Oakland County International Airport | Pontiac | Medium Airport |
| PTU | PAPM | Platinum Airport | Platinum | Medium Airport |
| PUB | KPUB | Pueblo Memorial Airport | Pueblo | Medium Airport |
| PUW | KPUW | Pullman-Moscow Regional Airport | Pullman | Medium Airport |
| PVU | KPVU | Provo Municipal Airport | Provo | Medium Airport |
| PWK | Chicago Executive Airport | Chicago/Prospect Heights/Wheeling | Medium Airport | |
| PWT | KPWT | Bremerton National Airport | Bremerton | Medium Airport |
| PWY | KPNA | Ralph Wenz Field | Pinedale | Medium Airport |
| RAL | KRAL | Riverside Municipal Airport | Riverside | Medium Airport |
| RAP | KRAP | Rapid City Regional Airport | Rapid City | Medium Airport |
| RBL | KRBL | Red Bluff Municipal Airport | Red Bluff | Medium Airport |
| RBY | PARY | Ruby Airport | Ruby | Medium Airport |
| RCA | KRCA | Ellsworth Air Force Base | Rapid City | Medium Airport |
| RDD | KRDD | Redding Municipal Airport | Redding | Medium Airport |
| RDG | KRDG | Reading Regional Airport (Carl A Spaatz Field) | Reading | Medium Airport |
| RDM | KRDM | Roberts Field | Redmond | Medium Airport |
| RDR | KRDR | Grand Forks Air Force Base | Grand Forks | Medium Airport |
| RFD | KRFD | Chicago Rockford International Airport | Chicago/Rockford | Medium Airport |
| RHI | KRHI | Rhinelander Oneida County Airport | Rhinelander | Medium Airport |
| RIL | KRIL | Garfield County Regional Airport | Rifle | Medium Airport |
| RIV | KRIV | March Air Reserve Base | Riverside | Medium Airport |
| RIW | KRIW | Central Wyoming Regional Airport | Riverton | Medium Airport |
| RKD | KRKD | Knox County Regional Airport | Rockland | Medium Airport |
| RKS | KRKS | Southwest Wyoming Regional Airport | Rock Springs | Medium Airport |
| RME | KRME | Griffiss International Airport | Rome | Medium Airport |
| RMG | KRMG | Richard B Russell Airport | Rome | Medium Airport |
| RND | KRND | Randolph Air Force Base | Universal City | Medium Airport |
| RNH | KRNH | New Richmond Regional Airport | New Richmond | Medium Airport |
| ROA | KROA | Roanoke–Blacksburg Regional Airport | Roanoke | Medium Airport |
| ROW | KROW | Roswell Air Center Airport | Roswell | Medium Airport |
| RSL | KRSL | Russell Municipal Airport | Russell | Medium Airport |
| RST | KRST | Rochester International Airport | Rochester | Medium Airport |
| RUI | KSRR | Sierra Blanca Regional Airport | Alto | Medium Airport |
| RUT | KRUT | Rutland - Southern Vermont Regional Airport | Rutland | Medium Airport |
| RVS | KRVS | Tulsa Riverside Airport | Tulsa | Medium Airport |
| RWF | KRWF | Redwood Falls Municipal Airport | Redwood Falls | Medium Airport |
| RWI | KRWI | Rocky Mount Wilson Regional Airport | Rocky Mount | Medium Airport |
| RWL | KRWL | Rawlins Municipal Airport/Harvey Field | Rawlins | Medium Airport |
| SAC | KSAC | Sacramento Executive Airport | Sacramento | Medium Airport |
| SAF | KSAF | Santa Fe Municipal Airport | Santa Fe | Medium Airport |
| SBA | KSBA | Santa Barbara Municipal Airport | Santa Barbara | Medium Airport |
| SBN | KSBN | South Bend International Airport | South Bend | Medium Airport |
| SBP | KSBP | San Luis County Regional Airport | San Luis Obispo | Medium Airport |
| SBY | KSBY | Salisbury Ocean City Wicomico Regional Airport | Salisbury | Medium Airport |
| SCC | PASC | Deadhorse Airport | Deadhorse | Medium Airport |
| SCE | KUNV | State College Regional Airport | State College | Medium Airport |
| SCH | KSCH | Schenectady County Airport | Schenectady | Medium Airport |
| SCK | KSCK | Stockton Metropolitan Airport | Stockton | Medium Airport |
| SDM | KSDM | Brown Field Municipal Airport | San Diego | Medium Airport |
| SDP | PASD | Sand Point Airport | Sand Point | Medium Airport |
| SDY | KSDY | Sidney - Richland Regional Airport | Sidney | Medium Airport |
| SFF | KSFF | Felts Field | Spokane | Medium Airport |
| SGF | KSGF | Springfield Branson National Airport | Springfield | Medium Airport |
| SGH | KSGH | Springfield-Beckley Municipal Airport | Springfield | Medium Airport |
| SGR | KSGR | Sugar Land Regional Airport | Houston | Medium Airport |
| SGU | KSGU | St George Regional Airport | St George | Medium Airport |
| SHD | KSHD | Shenandoah Valley Regional Airport | Weyers Cave | Medium Airport |
| SHR | KSHR | Sheridan County Airport | Sheridan | Medium Airport |
| SHV | KSHV | Shreveport Regional Airport | Shreveport | Medium Airport |
| SIT | PASI | Sitka Rocky Gutierrez Airport | Sitka | Medium Airport |
| SJT | KSJT | San Angelo Regional Mathis Field | San Angelo | Medium Airport |
| SKA | KSKA | Fairchild Air Force Base | Spokane | Medium Airport |
| SKF | KSKF | Lackland Air Force Base | San Antonio | Medium Airport |
| SLE | KSLE | Salem-Willamette Valley Airport/McNary Field | Salem | Medium Airport |
| SLK | KSLK | Adirondack Regional Airport | Saranac Lake | Medium Airport |
| SLN | KSLN | Salina Municipal Airport | Salina | Medium Airport |
| SME | KSME | Lake Cumberland Regional Airport | Somerset | Medium Airport |
| SMN | KSMN | Lemhi County Airport | Salmon | Medium Airport |
| SMO | KSMO | Santa Monica Municipal Airport | Santa Monica | Medium Airport |
| SMX | KSMX | Santa Maria Public Airport Captain G Allan Hancock Field | Santa Maria | Medium Airport |
| SNP | PASN | St Paul Island Airport | St Paul Island | Medium Airport |
| SNS | KSNS | Salinas Municipal Airport | Salinas | Medium Airport |
| SNY | KSNY | Sidney Municipal Airport Lloyd W Carr Field | Sidney | Medium Airport |
| SOW | KSOW | Show Low Regional Airport | Show Low | Medium Airport |
| SPI | KSPI | Abraham Lincoln Capital Airport | Springfield | Medium Airport |
| SPS | KSPS | Wichita Falls Municipal Airport / Sheppard Air Force Base | Wichita Falls | Medium Airport |
| SQL | KSQL | San Carlos Airport | San Carlos | Medium Airport |
| SSC | KSSC | Shaw Air Force Base | Sumter | Medium Airport |
| SSF | KSSF | Stinson Municipal Airport | San Antonio | Medium Airport |
| SSI | KSSI | St Simons Island Airport | St Simons Island | Medium Airport |
| STC | KSTC | Saint Cloud Regional Airport | Saint Cloud | Medium Airport |
| STG | PAPB | St George Airport | St George | Medium Airport |
| STJ | KSTJ | Rosecrans Memorial Airport | St Joseph | Medium Airport |
| STP | KSTP | Saint Paul Downtown Holman Field | Saint Paul | Medium Airport |
| STS | KSTS | Charles M. Schulz Sonoma County Airport | Santa Rosa | Medium Airport |
| SUN | KSUN | Friedman Memorial Airport | Hailey | Medium Airport |
| SUS | KSUS | Spirit of St Louis Airport | St Louis | Medium Airport |
| SUU | KSUU | Travis Air Force Base | Fairfield | Medium Airport |
| SUX | KSUX | Sioux Gateway Airport / Brigadier General Bud Day Field | Sioux City | Medium Airport |
| SVA | PASA | Savoonga Airport | Savoonga | Medium Airport |
| SVC | KSVC | Grant County Airport | Silver City | Medium Airport |
| SVN | KSVN | Hunter Army Air Field | Savannah | Medium Airport |
| SVW | PASV | Sparrevohn LRRS Airport | Sparrevohn | Medium Airport |
| SWD | PAWD | Seward Airport | Seward | Medium Airport |
| SWF | KSWF | New York Stewart International Airport | Newburgh | Medium Airport |
| SWO | KSWO | Stillwater Regional Airport | Stillwater | Medium Airport |
| SXQ | PASX | Soldotna Airport | Soldotna | Medium Airport |
| SYA | PASY | Eareckson Air Station | Shemya | Medium Airport |
| SZL | KSZL | Whiteman Air Force Base | Knob Noster | Medium Airport |
| TBN | KTBN | Waynesville-St. Robert Regional Airport-Forney Field | Fort Leonard Wood | Medium Airport |
| TCC | KTCC | Tucumcari Municipal Airport | Tucumcari | Medium Airport |
| TCL | KTCL | Tuscaloosa National Airport | Tuscaloosa | Medium Airport |
| TCM | KTCM | McChord Air Force Base | Tacoma | Medium Airport |
| TCS | KTCS | Truth or Consequences Municipal Airport | Truth or Consequences | Medium Airport |
| TEB | KTEB | Teterboro Airport | Teterboro | Medium Airport |
| TEX | KTEX | Telluride Regional Airport | Telluride | Medium Airport |
| TIK | KTIK | Tinker Air Force Base | Oklahoma City | Medium Airport |
| TIW | KTIW | Tacoma Narrows Airport | Tacoma | Medium Airport |
| TIX | KTIX | Space Coast Regional Airport | Titusville | Medium Airport |
| TKA | PATK | Talkeetna Airport | Talkeetna | Medium Airport |
| TKF | KTRK | Truckee Tahoe Airport | Truckee | Medium Airport |
| TLH | KTLH | Tallahassee International Airport | Tallahassee | Medium Airport |
| TLJ | PATL | Tatalina LRRS Airport | Takotna | Medium Airport |
| TMB | KTMB | Miami Executive Airport | Miami | Medium Airport |
| TOI | KTOI | Troy Municipal Airport at N Kenneth Campbell Field | Troy | Medium Airport |
| TOL | KTOL | Eugene F. Kranz Toledo Express Airport | Toledo | Medium Airport |
| TOP | KTOP | Philip Billard Municipal Airport | Topeka | Medium Airport |
| TPH | KTPH | Tonopah Airport | Tonopah | Medium Airport |
| TPL | KTPL | Draughon Miller Central Texas Regional Airport | Temple | Medium Airport |
| TRI | KTRI | Tri-Cities Regional TN/VA Airport | Blountville | Medium Airport |
| TRM | KTRM | Jacqueline Cochran Regional Airport | Palm Springs | Medium Airport |
| TSM | KSKX | Taos Regional Airport | Taos | Medium Airport |
| TTD | KTTD | Portland Troutdale Airport | Portland | Medium Airport |
| TTN | KTTN | Trenton Mercer Airport | Ewing Township | Medium Airport |
| TUP | KTUP | Tupelo Regional Airport | Tupelo | Medium Airport |
| TVC | KTVC | Cherry Capital Airport | Traverse City | Medium Airport |
| TVF | KTVF | Thief River Falls Regional Airport | Thief River Falls | Medium Airport |
| TVL | KTVL | Lake Tahoe Airport | South Lake Tahoe | Medium Airport |
| TWF | KTWF | Joslin Field Magic Valley Regional Airport | Twin Falls | Medium Airport |
| TXK | KTXK | Texarkana Regional Airport (Webb Field) | Texarkana | Medium Airport |
| TYR | KTYR | Tyler Pounds Regional Airport | Tyler | Medium Airport |
| UIN | KUIN | Quincy Regional Airport Baldwin Field | Quincy | Medium Airport |
| UKI | KUKI | Ukiah Municipal Airport | Ukiah | Medium Airport |
| UNK | PAUN | Unalakleet Airport | Unalakleet | Medium Airport |
| UOX | KUOX | University Oxford Airport | Oxford | Medium Airport |
| USA | KJQF | Concord-Padgett Regional Airport | Concord | Medium Airport |
| UST | KSGJ | Northeast Florida Regional Airport | St Augustine | Medium Airport |
| UTO | PAIM | Indian Mountain LRRS Airport | Utopia Creek | Medium Airport |
| VAD | KVAD | Moody Air Force Base | Valdosta | Medium Airport |
| VBG | KVBG | Vandenberg Space Force Base | Lompoc | Medium Airport |
| VCT | KVCT | Victoria Regional Airport | Victoria | Medium Airport |
| VDZ | PAVD | Valdez Pioneer Field | Valdez | Medium Airport |
| VEL | KVEL | Vernal Regional Airport | Vernal | Medium Airport |
| VGT | KVGT | North Las Vegas Airport | Las Vegas | Medium Airport |
| VIS | KVIS | Visalia Municipal Airport | Visalia | Medium Airport |
| VLD | KVLD | Valdosta Regional Airport | Valdosta | Medium Airport |
| VNY | KVNY | Van Nuys Airport | Van Nuys | Medium Airport |
| VOK | KVOK | Volk Field | Camp Douglas | Medium Airport |
| VPS | KVPS | Destin-Fort Walton Beach Airport | Valparaiso | Medium Airport |
| VPZ | KVPZ | Porter County Municipal Airport | Valparaiso | Medium Airport |
| VQQ | KVQQ | Cecil Airport | Jacksonville | Medium Airport |
| VRB | KVRB | Vero Beach Regional Airport | Vero Beach | Medium Airport |
| VTN | KVTN | Miller Field | Valentine | Medium Airport |
| WJF | KWJF | General William J Fox Airfield | Lancaster | Medium Airport |
| WKK | Aleknagik / New Airport | Aleknagik | Medium Airport | |
| WMC | KWMC | Winnemucca Municipal Airport | Winnemucca | Medium Airport |
| WMH | KBPK | Ozark Regional Airport | Mountain Home | Medium Airport |
| WRB | KWRB | Robins Air Force Base | Warner Robins | Medium Airport |
| WRG | PAWG | Wrangell Airport | Wrangell | Medium Airport |
| WRI | KWRI | Mc Guire Air Force Base | Wrightstown | Medium Airport |
| WRL | KWRL | Worland Municipal Airport | Worland | Medium Airport |
| WST | KWST | Westerly State Airport | Westerly | Medium Airport |
| WWA | PAWS | Wasilla Airport | Wasilla | Medium Airport |
| WWD | KWWD | Cape May County Airport | Wildwood | Medium Airport |
| WWR | KWWR | West Woodward Airport | Woodward | Medium Airport |
| WYS | KWYS | Yellowstone Airport | West Yellowstone | Medium Airport |
| XNA | KXNA | Northwest Arkansas National Airport | Fayetteville/Springdale/Rogers | Medium Airport |
| XWA | KXWA | Williston Basin International Airport | Williston | Medium Airport |
| YAK | PAYA | Yakutat Airport | Yakutat | Medium Airport |
| YIP | KYIP | Willow Run Airport | Detroit | Medium Airport |
| YKM | KYKM | Yakima Air Terminal McAllister Field | Yakima | Medium Airport |
| YKN | KYKN | Chan Gurney Municipal Airport | Yankton | Medium Airport |
| YNG | KYNG | Youngstown Warren Regional Airport | Youngstown/Warren | Medium Airport |
| YUM | KNYL | Yuma International Airport / Marine Corps Air Station Yuma | Yuma | Medium Airport |
| ZZV | KZZV | Zanesville Municipal Airport | Zanesville | Medium Airport |
| AAF | KAAF | Apalachicola Regional Airport | Apalachicola | Small Airport |
| ACB | KACB | Antrim County Airport | Bellaire | Small Airport |
| ADG | KADG | Lenawee County Airport | Adrian | Small Airport |
| ADM | KADM | Ardmore Municipal Airport | Ardmore | Small Airport |
| ADR | KPHH | Robert F Swinnie Airport | Andrews | Small Airport |
| ADS | KADS | Addison Airport | Dallas | Small Airport |
| AEL | KAEL | Albert Lea Municipal Airport | Albert Lea | Small Airport |
| AET | PFAL | Allakaket Airport | Allakaket | Small Airport |
| AFF | KAFF | USAF Academy Airfield | Colorado Springs | Small Airport |
| AFN | KAFN | Jaffrey Airfield Silver Ranch Airport | Jaffrey | Small Airport |
| AFO | KAFO | Afton Municipal Airport | Afton | Small Airport |
| AGO | KAGO | Magnolia Municipal Airport / Ralph C Weiser Field | Magnolia | Small Airport |
| AHC | KAHC | Amedee Army Air Field | Herlong | Small Airport |
| AHD | Ardmore Downtown Executive Airport | Ardmore | Small Airport | |
| AHF | Arapahoe Municipal Airport | Arapahoe | Small Airport | |
| AHH | KAHH | Amery Municipal Airport | Amery | Small Airport |
| AHM | Ashland Municipal Airport Sumner Parker Field | Ashland | Small Airport | |
| AID | KAID | Anderson Municipal Darlington Field | Anderson | Small Airport |
| AIK | KAIK | Aiken Regional Airport | Aiken | Small Airport |
| AIO | KAIO | Atlantic Municipal Airport | Atlantic | Small Airport |
| AIV | KAIV | George Downer Airport | Aliceville | Small Airport |
| AIZ | KAIZ | Lee C Fine Memorial Airport | Kaiser Lake Ozark | Small Airport |
| AKB | PAAK | Atka Airport | Atka | Small Airport |
| AKI | PFAK | Akiak Airport | Akiak | Small Airport |
| AKK | PAKH | Akhiok Airport | Akhiok | Small Airport |
| AKO | KAKO | Colorado Plains Regional Airport | Akron | Small Airport |
| ALE | Alpine Casparis Municipal Airport | Alpine | Small Airport | |
| ALX | KALX | Thomas C Russell Field | Alexander City | Small Airport |
| AMK | Animas Air Park | Durango | Small Airport | |
| AMN | KAMN | Gratiot Community Airport | Alma | Small Airport |
| AMW | KAMW | Ames Municipal Airport | Ames | Small Airport |
| ANP | KANP | Lee Airport | Annapolis | Small Airport |
| ANQ | KANQ | Tri State Steuben County Airport | Angola | Small Airport |
| ANW | KANW | Ainsworth Regional Airport | Ainsworth | Small Airport |
| ANY | KANY | Anthony Municipal Airport | Anthony | Small Airport |
| AOH | KAOH | Lima Allen County Airport | Lima | Small Airport |
| APC | KAPC | Napa County Airport | Napa | Small Airport |
| APH | KAPH | Mary Walker LZ Airport | Bowling Green | Small Airport |
| APT | KAPT | Marion County Airport - Brown Field | Jasper | Small Airport |
| APV | KAPV | Apple Valley Airport | Apple Valley | Small Airport |
| AQY | Girdwood-Alyeska Airport | Girdwood | Small Airport | |
| ARB | KARB | Ann Arbor Municipal Airport | Ann Arbor | Small Airport |
| ARG | KARG | Walnut Ridge Regional Airport | Walnut Ridge | Small Airport |
| ARV | KARV | Lakeland Airport Noble F Lee Memorial Field | Woodruff | Small Airport |
| ASH | KASH | Nashua Airport / Boire Field | Nashua | Small Airport |
| ASL | KASL | Harrison County Airport | Marshall | Small Airport |
| ASN | KASN | Talladega Municipal Airport | Talladega | Small Airport |
| ASQ | Austin Airport | Austin | Small Airport | |
| ASX | KASX | John F Kennedy Memorial Airport | Ashland | Small Airport |
| ASY | KASY | Ashley Municipal Airport | Ashley | Small Airport |
| ATE | Antlers Municipal Airport | Antlers | Small Airport | |
| ATO | KUNI | Ohio University Airport | Albany | Small Airport |
| ATS | KATS | Artesia Municipal Airport | Artesia | Small Airport |
| ATT | Atmautluak Airport | Atmautluak | Small Airport | |
| ATU | PAAT | Casco Cove Coast Guard Station | Attu | Small Airport |
| AUK | Alakanuk Airport | Alakanuk | Small Airport | |
| AUM | KAUM | Austin Municipal Airport | Austin | Small Airport |
| AUN | KAUN | Auburn Municipal Airport | Auburn | Small Airport |
| AUO | KAUO | Auburn University Regional Airport | Auburn | Small Airport |
| AUZ | KARR | Aurora Municipal Airport | Chicago/Aurora | Small Airport |
| AVO | KAVO | Avon Park Executive Airport | Avon Park | Small Airport |
| AVW | KAVQ | Marana Regional Airport | Marana | Small Airport |
| AVX | KAVX | Catalina Airport | Avalon | Small Airport |
| AWM | KAWM | West Memphis Municipal Airport | West Memphis | Small Airport |
| AXB | Maxson Airfield | Alexandria Bay | Small Airport | |
| AXG | KAXA | Algona Municipal Airport | Algona | Small Airport |
| AXS | KAXS | Altus Quartz Mountain Regional Airport | Altus | Small Airport |
| AXV | KAXV | Neil Armstrong Airport | Wapakoneta | Small Airport |
| AXX | KAXX | Angel Fire Airport | Angel Fire | Small Airport |
| AYS | KAYS | Waycross Ware County Airport | Waycross | Small Airport |
| BAM | KBAM | Battle Mountain Airport | Battle Mountain | Small Airport |
| BBB | KBBB | Benson Municipal Airport | Benson | Small Airport |
| BBC | KBYY | Bay City Regional Airport | Bay City | Small Airport |
| BBW | KBBW | Broken Bow Municipal Airport | Broken Bow | Small Airport |
| BBX | KLOM | Wings Field | Philadelphia | Small Airport |
| BCB | KBCB | Virginia Tech Montgomery Executive Airport | Blacksburg | Small Airport |
| BCC | Bear Creek 3 Airport | Bear Creek | Small Airport | |
| BCS | Southern Seaplane Airport | Belle Chasse | Small Airport | |
| BDF | Rinkenberger Restricted Landing Area | Bradford | Small Airport | |
| BDG | KBDG | Blanding Municipal Airport | Blanding | Small Airport |
| BDX | Broadus Airport | Broadus | Small Airport | |
| BDY | Bandon State Airport | Bandon | Small Airport | |
| BEC | KBEC | Beech Factory Airport | Wichita | Small Airport |
| BEH | KBEH | Southwest Michigan Regional Airport | Benton Harbor | Small Airport |
| BFG | Bullfrog Basin Airport | Bullfrog | Small Airport | |
| BFR | KBFR | Virgil I Grissom Municipal Airport | Bedford | Small Airport |
| BFT | KARW | Beaufort Executive Airport | Beaufort | Small Airport |
| BGD | KBGD | Hutchinson County Airport | Borger | Small Airport |
| BGE | KBGE | Decatur County Industrial Air Park | Bainbridge | Small Airport |
| BGQ | PAGQ | Big Lake Airport | Big Lake | Small Airport |
| BGT | Bagdad Airport | Bagdad | Small Airport | |
| BID | KBID | Block Island State Airport | Block Island | Small Airport |
| BIE | KBIE | Beatrice Municipal Airport | Beatrice | Small Airport |
| BJJ | KBJJ | Wayne County Airport | Wooster | Small Airport |
| BKC | PABL | Buckland Airport | Buckland | Small Airport |
| BKD | KBKD | Stephens County Airport | Breckenridge | Small Airport |
| BKT | KBKT | Allen C Perkinson Blackstone Army Air Field | Blackstone | Small Airport |
| BKX | KBKX | Brookings Regional Airport | Brookings | Small Airport |
| BLM | KBLM | Monmouth Executive Airport | Belmar/Farmingdale | Small Airport |
| BLU | KBLU | Blue Canyon Nyack Airport | Emigrant Gap | Small Airport |
| BMC | KBMC | Brigham City Regional Airport | Brigham City | Small Airport |
| BML | KBML | Berlin Regional Airport | Berlin | Small Airport |
| BMT | KBMT | Beaumont Municipal Airport | Beaumont | Small Airport |
| BMX | PABM | Big Mountain Airport | Big Mountain | Small Airport |
| BNG | KBNG | Banning Municipal Airport | Banning | Small Airport |
| BNL | KBNL | Barnwell Regional Airport | Barnwell | Small Airport |
| BNW | KBNW | Boone Municipal Airport | Boone | Small Airport |
| BOK | KBOK | Brookings Airport | Brookings | Small Airport |
| BOW | KBOW | Bartow Executive Airport | Bartow | Small Airport |
| BRY | KBRY | Samuels Field | Bardstown | Small Airport |
| BSF | PHSF | Bradshaw Army Airfield | Waimea (Kamuela) | Small Airport |
| BSQ | Bisbee Municipal Airport | Bisbee | Small Airport | |
| BSW | Boswell Bay Airport | Boswell Bay | Small Airport | |
| BTF | KBTF | Skypark Airport | Bountiful | Small Airport |
| BTN | KBBP | Marlboro County Jetport - H E Avent Field Airport | Bennettsville | Small Airport |
| BTP | KBTP | Pittsburgh/Butler Regional Airport | Butler | Small Airport |
| BTT | PABT | Bettles Airport | Bettles | Small Airport |
| BTY | KBTY | Beatty Airport | Beatty | Small Airport |
| BUB | KBUB | Cram Field | Burwell | Small Airport |
| BUM | KBUM | Butler Memorial Airport | Butler | Small Airport |
| BVO | KBVO | Bartlesville Municipal Airport | Bartlesville | Small Airport |
| BVU | PABG | Beluga Airport | Beluga | Small Airport |
| BVX | KBVX | Batesville Regional Airport | Batesville | Small Airport |
| BWC | KBWC | Brawley Municipal Airport | Brawley | Small Airport |
| BWD | KBWD | Brownwood Regional Airport | Brownwood | Small Airport |
| BWL | Earl Henry Airport | Blackwell | Small Airport | |
| BWM | Bowman Regional Airport | Bowman | Small Airport | |
| BXA | KBXA | George R Carr Memorial Air Field | Bogalusa | Small Airport |
| BXK | KBXK | Buckeye Municipal Airport | Buckeye | Small Airport |
| BXS | Borrego Valley Airport | Borrego Springs | Small Airport | |
| BYA | Boundary Airport | Boundary | Small Airport | |
| BYG | KBYG | Johnson County Airport | Buffalo | Small Airport |
| BYW | Blakely Island Airport | Blakely Island | Small Airport | |
| BZF | Benton Field | Redding | Small Airport | |
| BZT | Eagle Air Park | Brazoria | Small Airport | |
| CAD | KCAD | Wexford County Airport | Cadillac | Small Airport |
| CAO | KCAO | Clayton Municipal Airpark | Clayton | Small Airport |
| CBE | KCBE | Greater Cumberland Regional Airport | Wiley Ford | Small Airport |
| CBF | KCBF | Council Bluffs Municipal Airport | Council Bluffs | Small Airport |
| CBK | KCBK | Shalz Field | Colby | Small Airport |
| CCB | KCCB | Upland-Cable Airport | Upland | Small Airport |
| CCG | Crane County Airport | Crane | Small Airport | |
| CDH | KCDH | Harrell Field | Camden | Small Airport |
| CDK | KCDK | George T Lewis Airport | Cedar Key | Small Airport |
| CDL | Candle 2 Airport | Candle | Small Airport | |
| CDN | KCDN | Woodward Field | Camden | Small Airport |
| CDW | KCDW | Essex County Airport | Caldwell | Small Airport |
| CEA | KCEA | Cessna Aircraft Field | Wichita | Small Airport |
| CEM | PACE | Central Airport | Central | Small Airport |
| CEU | KCEU | Oconee County Regional Airport | Clemson | Small Airport |
| CEV | KCEV | Mettel Field | Connersville | Small Airport |
| CEX | Chena Hot Springs Airport | Chena Hot Springs | Small Airport | |
| CEY | KCEY | Murray-Calloway County Airport Kyle-Oakley Field | Murray | Small Airport |
| CFD | KCFD | Coulter Field | Bryan | Small Airport |
| CFT | KCFT | Greenlee County Airport | Clifton | Small Airport |
| CFV | KCFV | Coffeyville Municipal Airport | Coffeyville | Small Airport |
| CGE | KCGE | Cambridge Dorchester Airport | Cambridge | Small Airport |
| CGS | KCGS | College Park Airport | College Park | Small Airport |
| CGZ | KCGZ | Casa Grande Municipal Airport | Casa Grande | Small Airport |
| CHK | KCHK | Chickasha Municipal Airport | Chickasha | Small Airport |
| CHL | KLLJ | Challis Airport | Challis | Small Airport |
| CHP | Circle Hot Springs Airport | Circle Hot Springs | Small Airport | |
| CHU | Chuathbaluk Airport | Chuathbaluk | Small Airport | |
| CHZ | Chiloquin State Airport | Chiloquin | Small Airport | |
| CIC | KCIC | Chico Regional Airport | Chico | Small Airport |
| CIG | KCAG | Craig Moffat Airport | Craig | Small Airport |
| CIK | PACI | Chalkyitsik Airport | Chalkyitsik | Small Airport |
| CIL | Council Airport | Council | Small Airport | |
| CIN | KCIN | Arthur N Neu Airport | Carroll | Small Airport |
| CIR | KCIR | Cairo Regional Airport | Cairo | Small Airport |
| CKA | KCKA | Kegelman AF Aux Field | Cherokee | Small Airport |
| CKD | Crooked Creek Airport | Crooked Creek | Small Airport | |
| CKE | Lampson Field | Lakeport | Small Airport | |
| CKK | KCVK | Sharp County Regional Airport | Ash Flat | Small Airport |
| CKM | KCKM | Fletcher Field | Clarksdale | Small Airport |
| CKN | KCKN | Crookston Municipal Kirkwood Field | Crookston | Small Airport |
| CKR | Crane Island Airstrip | Crane Island | Small Airport | |
| CKU | Cordova Municipal Airport | Cordova | Small Airport | |
| CKV | KCKV | Clarksville–Montgomery County Regional Airport | Clarksville | Small Airport |
| CKX | Chicken Airport | Chicken | Small Airport | |
| CLG | New Coalinga Municipal Airport | Coalinga | Small Airport | |
| CLI | KCLI | Clintonville Municipal Airport | Clintonville | Small Airport |
| CLK | KCLK | Clinton Regional Airport | Clinton | Small Airport |
| CLP | PFCL | Clarks Point Airport | Clarks Point | Small Airport |
| CLR | KCLR | Cliff Hatfield Memorial Airport | Calipatria | Small Airport |
| CLS | KCLS | Chehalis Centralia Airport | Chehalis | Small Airport |
| CLW | KCLW | Clearwater Air Park | Clearwater | Small Airport |
| CMY | KCMY | Sparta Fort McCoy Airport | Sparta | Small Airport |
| CNE | Fremont County Airport | Penrose | Small Airport | |
| CNH | KCNH | Claremont Municipal Airport | Claremont | Small Airport |
| CNK | KCNK | Blosser Municipal Airport | Concordia | Small Airport |
| CNO | KCNO | Chino Airport | Chino | Small Airport |
| CNW | KCNW | TSTC Waco Airport | Waco | Small Airport |
| COA | Columbia Airport | Columbia | Small Airport | |
| COI | KCOI | Merritt Island Airport | Merritt Island | Small Airport |
| COM | KCOM | Coleman Municipal Airport | Coleman | Small Airport |
| COP | Cooperstown-Westville Airport | Cooperstown | Small Airport | |
| COT | KCOT | Cotulla-La Salle County Airport | Cotulla | Small Airport |
| CPM | KCPM | Compton Woodley Airport | Compton | Small Airport |
| CPS | KCPS | St Louis Downtown Airport | Cahokia/St Louis | Small Airport |
| CRO | Corcoran Airport | Corcoran | Small Airport | |
| CRS | KCRS | C David Campbell Field Corsicana Municipal Airport | Corsicana | Small Airport |
| CRT | KCRT | Z M Jack Stell Field | Crossett | Small Airport |
| CRX | KCRX | Roscoe Turner Airport | Corinth | Small Airport |
| CSE | Crested Butte Airpark | Crested Butte | Small Airport | |
| CSM | KCSM | Clinton Sherman Airport | Clinton | Small Airport |
| CSQ | KCSQ | Creston Municipal Airport | Creston | Small Airport |
| CTH | KMQS | Chester County G O Carlson Airport | Coatesville | Small Airport |
| CTK | Canton Municipal Airport | Canton | Small Airport | |
| CTO | Calverton Executive Airpark | Calverton | Small Airport | |
| CTW | Cottonwood Airport | Cottonwood | Small Airport | |
| CTX | Cortland County Chase Field | Cortland | Small Airport | |
| CTY | KCTY | Cross City Airport | Cross City | Small Airport |
| CTZ | KCTZ | Sampson County Airport | Clinton | Small Airport |
| CUH | KCUH | Cushing Municipal Airport | Cushing | Small Airport |
| CUS | Columbus Airport | Columbus | Small Airport | |
| CWF | KCWF | Chennault International Airport | Lake Charles | Small Airport |
| CWI | KCWI | Clinton Municipal Airport | Clinton | Small Airport |
| CWS | Center Island Airport | Center Island | Small Airport | |
| CWX | Cochise County Airport | Willcox | Small Airport | |
| CXC | Chitina Airport | Chitina | Small Airport | |
| CXF | PACX | Coldfoot Airport | Coldfoot | Small Airport |
| CXL | KCXL | Calexico International Airport | Calexico | Small Airport |
| CYF | PACK | Chefornak Airport | Chefornak | Small Airport |
| CYT | PACY | Yakataga Airport | Yakataga | Small Airport |
| CZC | Copper Center 2 Airport | Copper Center | Small Airport | |
| CZK | KCZK | Cascade Locks State Airport | Cascade Locks | Small Airport |
| CZN | Chisana Airport | Chisana | Small Airport | |
| CZO | Chistochina Airport | Chistochina | Small Airport | |
| CZT | KCZT | Dimmit County Airport | Carrizo Springs | Small Airport |
| DBN | KDBN | W H 'Bud' Barron Airport | Dublin | Small Airport |
| DBS | Dubois Municipal Airport | Dubois | Small Airport | |
| DCK | Dahl Creek Airport | Dahl Creek | Small Airport | |
| DCU | KDCU | Pryor Field Regional Airport | Decatur | Small Airport |
| DEH | KDEH | Decorah Municipal Airport | Decorah | Small Airport |
| DFI | KDFI | Defiance Memorial Airport | Defiance | Small Airport |
| DGL | KDGL | Douglas Municipal Airport | Douglas | Small Airport |
| DGN | KNDY | Dahlgren Naval Surface Warfare Center Airport | Dahlgren | Small Airport |
| DGW | KDGW | Converse County Airport | Douglas | Small Airport |
| DJN | Delta Junction Airport | Delta Junction | Small Airport | |
| DKK | KDKK | Chautauqua County-Dunkirk Airport | Dunkirk | Small Airport |
| DLL | KDLC | Dillon County Airport | Dillon | Small Airport |
| DLN | KDLN | Dillon Airport | Dillon | Small Airport |
| DMO | KDMO | Sedalia Memorial Airport | Sedalia | Small Airport |
| DNN | KDNN | Dalton Municipal Airport | Dalton | Small Airport |
| DNS | KDNS | Denison Municipal Airport | Denison | Small Airport |
| DNV | KDNV | Vermilion Regional Airport | Danville | Small Airport |
| DPG | KDPG | Michael AAF (Dugway Proving Ground) Airport | Dugway Proving Ground | Small Airport |
| DRE | KDRM | Drummond Island Airport | Drummond Island | Small Airport |
| DRF | Drift River Airport | Kenai | Small Airport | |
| DRU | Drummond Airport | Drummond | Small Airport | |
| DSV | KDSV | Dansville Municipal Airport | Dansville | Small Airport |
| DTA | KDTA | Delta Municipal Airport | Delta | Small Airport |
| DTH | Furnace Creek Airport | Death Valley | Small Airport | |
| DTL | KDTL | Detroit Lakes Airport | Detroit Lakes | Small Airport |
| DTN | KDTN | Shreveport Downtown Airport | Shreveport | Small Airport |
| DTR | Decatur Shores Airport | Decatur | Small Airport | |
| DUC | KDUC | Halliburton Field | Duncan | Small Airport |
| DUF | Pine Island Airport | Corolla | Small Airport | |
| DVN | KDVN | Davenport Municipal Airport | Davenport | Small Airport |
| DVT | KDVT | Phoenix Deer Valley Airport | Phoenix | Small Airport |
| DWH | KDWH | David Wayne Hooks Memorial Airport | Houston | Small Airport |
| DXE | KMBO | Bruce Campbell Field | Madison | Small Airport |
| DYL | KDYL | Doylestown Airport | Doylestown | Small Airport |
| EAA | PAEG | Eagle Airport | Eagle | Small Airport |
| EAN | KEAN | Phifer Airfield | Wheatland | Small Airport |
| EBS | KEBS | Webster City Municipal Airport | Webster City | Small Airport |
| ECA | Iosco County Airport | East Tawas | Small Airport | |
| ECS | KECS | Mondell Field | Newcastle | Small Airport |
| EDE | KEDE | Northeastern Regional Airport | Edenton | Small Airport |
| EDK | KEQA | Captain Jack Thomas El Dorado Airport | El Dorado | Small Airport |
| EEK | PAEE | Eek Airport | Eek | Small Airport |
| EFK | KEFK | Northeast Kingdom International Airport | Newport | Small Airport |
| EFW | KEFW | Jefferson Municipal Airport | Jefferson | Small Airport |
| EGP | Maverick County Memorial International Airport | Eagle Pass | Small Airport | |
| EGV | KEGV | Eagle River Union Airport | Eagle River | Small Airport |
| EKI | KEKM | Elkhart Municipal Airport | Elkhart | Small Airport |
| EKX | KEKX | Addington Field / Elizabethtown Regional Airport | Elizabethtown | Small Airport |
| ELA | KELA | Eagle Lake Airport | Eagle Lake | Small Airport |
| ELI | PFEL | Elim Airport | Elim | Small Airport |
| ELK | KELK | Elk City Regional Business Airport | Elk City | Small Airport |
| ELN | KELN | Bowers Field | Ellensburg | Small Airport |
| ELZ | KELZ | Wellsville Municipal Airport - Tarantine Field | Wellsville | Small Airport |
| EMM | KEMM | Kemmerer Municipal Airport | Kemmerer | Small Airport |
| EMP | KEMP | Emporia Municipal Airport | Emporia | Small Airport |
| EMT | KEMT | San Gabriel Valley Airport | El Monte | Small Airport |
| ENL | KENL | Centralia Municipal Airport | Centralia | Small Airport |
| EOK | KEOK | Keokuk Municipal Airport | Keokuk | Small Airport |
| EOS | KEOS | Neosho Hugh Robinson Airport | Neosho | Small Airport |
| EPG | Browns Airport | Weeping Water | Small Airport | |
| EPH | KEPH | Ephrata Municipal Airport | Ephrata | Small Airport |
| ERR | KERR | Errol Airport | Errol | Small Airport |
| ERV | KERV | Kerrville / Kerr County Airport at Louis Schreiner Field | Kerrville | Small Airport |
| ESN | KESN | Easton Airport / Newnam Field | Easton | Small Airport |
| ESO | Ohkay Owingeh Airport | Espanola | Small Airport | |
| EST | KEST | Estherville Municipal Airport | Estherville | Small Airport |
| ESW | KESW | Easton State Airport | Easton | Small Airport |
| ETB | KETB | West Bend Municipal Airport | West Bend | Small Airport |
| ETN | KETN | Eastland Municipal Airport | Eastland | Small Airport |
| ETS | KEDN | Enterprise Municipal Airport | Enterprise | Small Airport |
| EUE | Eureka Airport | Eureka | Small Airport | |
| EUF | KEUF | Weedon Field | Eufaula | Small Airport |
| EVM | KEVM | Eveleth–Virginia Municipal Airport | Eveleth | Small Airport |
| EWK | KEWK | Newton City-County Airport | Newton | Small Airport |
| EYR | Yerington Municipal Airport | Yerington | Small Airport | |
| FAM | KFAM | Farmington Regional Airport | Farmington | Small Airport |
| FBL | KFBL | Faribault Municipal Airport-Liz Wall Strohfus Field | Faribault | Small Airport |
| FBR | KFBR | Fort Bridger Airport | Fort Bridger | Small Airport |
| FBY | KFBY | Fairbury Municipal Airport | Fairbury | Small Airport |
| FCH | KFCH | Fresno Chandler Executive Airport | Fresno | Small Airport |
| FCM | KFCM | Flying Cloud Airport | Minneapolis | Small Airport |
| FCY | KFCY | Forrest City Municipal Airport | Forrest City | Small Airport |
| FDK | KFDK | Frederick Municipal Airport | Frederick | Small Airport |
| FDR | KFDR | Frederick Regional Airport | Frederick | Small Airport |
| FEP | KFEP | Albertus Airport | Freeport | Small Airport |
| FET | KFET | Fremont Municipal Airport | Fremont | Small Airport |
| FFA | KFFA | First Flight Airport | Kill Devil Hills | Small Airport |
| FFL | KFFL | Fairfield Municipal Airport | Fairfield | Small Airport |
| FFM | KFFM | Fergus Falls Municipal Airport - Einar Mickelson Field | Fergus Falls | Small Airport |
| FFT | KFFT | Capital City Airport | Frankfort | Small Airport |
| FID | Elizabeth Field | Fishers Island | Small Airport | |
| FIL | KFOM | Fillmore Municipal Airport | Fillmore | Small Airport |
| FKN | KFKN | Franklin Regional Airport | Franklin | Small Airport |
| FLD | KFLD | Fond du Lac County Airport | Fond du Lac | Small Airport |
| FLP | KFLP | Marion County Regional Airport | Flippin | Small Airport |
| FLT | Flat Airport | Flat | Small Airport | |
| FLV | KFLV | Sherman Army Air Field | Fort Leavenworth | Small Airport |
| FLX | KFLX | Fallon Municipal Airport | Fallon | Small Airport |
| FMH | KFMH | Cape Cod Coast Guard Air Station | Falmouth | Small Airport |
| FMS | KFSW | Fort Madison Municipal Airport | Fort Madison | Small Airport |
| FMU | Florence Municipal Airport | Florence | Small Airport | |
| FOB | Fort Bragg Airport | Fort Bragg | Small Airport | |
| FOK | KFOK | Francis S Gabreski Airport | Westhampton Beach | Small Airport |
| FPY | Perry-Foley Airport | Perry | Small Airport | |
| FRH | KFRH | French Lick Municipal Airport | French Lick | Small Airport |
| FRM | KFRM | Fairmont Municipal Airport | Fairmont | Small Airport |
| FRN | PAFR | Bryant Army Airfield | Fort Richardson | Small Airport |
| FRR | KFRR | Front Royal Warren County Airport | Front Royal | Small Airport |
| FRY | KIZG | Eastern Slopes Regional Airport | Fryeburg | Small Airport |
| FSK | KFSK | Fort Scott Municipal Airport | Fort Scott | Small Airport |
| FSU | KFSU | Fort Sumner Municipal Airport | Fort Sumner | Small Airport |
| FUL | KFUL | Fullerton Municipal Airport | Fullerton | Small Airport |
| FWL | Farewell Airport | Farewell | Small Airport | |
| FXY | KFXY | Forest City Municipal Airport | Forest City | Small Airport |
| FYM | KFYM | Fayetteville Municipal Airport | Fayetteville | Small Airport |
| GAB | KGAB | Gabbs Airport | Gabbs | Small Airport |
| GAD | KGAD | Northeast Alabama Regional Airport | Gadsden | Small Airport |
| GAG | KGAG | Gage Heibeck Airport | Gage | Small Airport |
| GAI | KGAI | Montgomery County Airpark | Gaithersburg | Small Airport |
| GBD | KGBD | Great Bend Municipal Airport | Great Bend | Small Airport |
| GBG | KGBG | Galesburg Municipal Airport | Galesburg | Small Airport |
| GBH | PAGB | Galbraith Lake Airport | Galbraith Lake | Small Airport |
| GBR | KGBR | Walter J. Koladza Airport | Great Barrington | Small Airport |
| GCD | Grand Coulee Dam Airport | Electric City | Small Airport | |
| GCT | Grand Canyon Bar Ten Airstrip | Littlefield | Small Airport | |
| GCW | Grand Canyon West Airport | Peach Springs | Small Airport | |
| GCY | KGCY | Greeneville Municipal Airport | Greeneville | Small Airport |
| GDC | KGYH | Donaldson Field Airport | Greenville | Small Airport |
| GDM | KGDM | Gardner Municipal Airport | Gardner | Small Airport |
| GDW | KGDW | Gladwin Zettel Memorial Airport | Gladwin | Small Airport |
| GED | KGED | Delaware Coastal Airport | Georgetown | Small Airport |
| GEY | KGEY | South Big Horn County Airport | Greybull | Small Airport |
| GFD | KGFD | Pope Field | Greenfield | Small Airport |
| GGE | KGGE | Georgetown County Airport | Georgetown | Small Airport |
| GHM | KGHM | Centerville Municipal Airport | Centerville | Small Airport |
| GIF | KGIF | Winter Haven Regional Airport - Gilbert Field | Winter Haven | Small Airport |
| GKT | KGKT | Gatlinburg-Pigeon Forge Airport | Sevierville | Small Airport |
| GLB | San Carlos Apache Airport | Globe | Small Airport | |
| GLE | KGLE | Gainesville Municipal Airport | Gainesville | Small Airport |
| GLR | KGLR | Gaylord Regional Airport | Gaylord | Small Airport |
| GLV | PAGL | Golovin Airport | Golovin | Small Airport |
| GLW | KGLW | Glasgow Municipal Airport | Glasgow | Small Airport |
| GMT | PAGZ | Granite Mountain Air Station | Granite Mountain | Small Airport |
| GMV | Monument Valley Airport | Oljato-Monument Valley | Small Airport | |
| GNF | Gansner Field | Quincy | Small Airport | |
| GNG | KGNG | Gooding Municipal Airport | Gooding | Small Airport |
| GNT | KGNT | Grants-Milan Municipal Airport | Grants | Small Airport |
| GNU | Goodnews Airport | Goodnews | Small Airport | |
| GOK | KGOK | Guthrie-Edmond Regional Airport | Guthrie | Small Airport |
| GOL | Gold Beach Municipal Airport | Gold Beach | Small Airport | |
| GPZ | KGPZ | Grand Rapids Itasca Co-Gordon Newstrom field | Grand Rapids | Small Airport |
| GQQ | KGQQ | Galion Municipal Airport | Galion | Small Airport |
| GRD | KGRD | Greenwood County Airport | Greenwood | Small Airport |
| GRE | KGRE | Greenville Airport | Greenville | Small Airport |
| GRM | KCKC | Grand Marais Cook County Airport | Grand Marais | Small Airport |
| GRN | KGRN | Gordon Municipal Airport | Gordon | Small Airport |
| GSH | KGSH | Goshen Municipal Airport | Goshen | Small Airport |
| GTG | KGTG | Grantsburg Municipal Airport | Grantsburg | Small Airport |
| GTP | Grants Pass Airport | Grants Pass | Small Airport | |
| GTY | Gettysburg Regional Airport | Gettysburg | Small Airport | |
| GUF | KJKA | Jack Edwards National Airport | Gulf Shores | Small Airport |
| GVE | KGVE | Gordonsville Municipal Airport | Gordonsville | Small Airport |
| GVL | KGVL | Lee Gilmer Memorial Airport | Gainesville | Small Airport |
| GVT | KGVT | Majors Airport | Greenville | Small Airport |
| GWS | KGWS | Glenwood Springs Municipal Airport | Glenwood Springs | Small Airport |
| GWV | Glendale Fokker Field | Glendale | Small Airport | |
| GXY | KGXY | Greeley–Weld County Airport | Greeley | Small Airport |
| GYR | KGYR | Phoenix Goodyear Airport | Goodyear | Small Airport |
| HAB | KHAB | Marion County Rankin Fite Airport | Hamilton | Small Airport |
| HAF | KHAF | Half Moon Bay Airport | Half Moon Bay | Small Airport |
| HAI | KHAI | Three Rivers Municipal Dr Haines Airport | Three Rivers | Small Airport |
| HAO | KHAO | Butler Co Regional Airport - Hogan Field | Hamilton | Small Airport |
| HAR | KCXY | Capital City Airport | Harrisburg | Small Airport |
| HBB | Industrial Airpark | Hobbs | Small Airport | |
| HBK | Holbrook Municipal Airport | Holbrook | Small Airport | |
| HCA | KBPG | Big Spring Mc Mahon-Wrinkle Airport | Big Spring | Small Airport |
| HCC | Columbia County Airport | Hudson | Small Airport | |
| HCW | KCQW | Cheraw Municipal Airport/Lynch Bellinger Field | Cheraw | Small Airport |
| HDE | KHDE | Brewster Field | Holdrege | Small Airport |
| HDH | PHDH | Kawaihapai Airfield | Mokuleia | Small Airport |
| HED | Herendeen Bay Airport | Herendeen Bay | Small Airport | |
| HEE | KHEE | Thompson-Robbins Airport | West Helena | Small Airport |
| HES | KHRI | Hermiston Municipal Airport | Hermiston | Small Airport |
| HEZ | KHEZ | Natchez–Adams County Airport / Hardy-Anders Field | Natchez | Small Airport |
| HFF | KHFF | Mackall Army Air Field | Hoffman | Small Airport |
| HGZ | Hog River Airport | Hogatza | Small Airport | |
| HHI | PHHI | Wheeler Army Airfield | Wahiawa | Small Airport |
| HIE | KHIE | Mount Washington Regional Airport | Whitefield | Small Airport |
| HKA | KHKA | Blytheville Municipal Airport | Blytheville | Small Airport |
| HKB | Healy Lake Airport | Healy Lake | Small Airport | |
| HKS | KHKS | Hawkins Field | Jackson | Small Airport |
| HLB | KHLB | Batesville Airport | Batesville | Small Airport |
| HLC | KHLC | Hill City Municipal Airport | Hill City | Small Airport |
| HLI | KCVH | Hollister Municipal Airport | Hollister | Small Airport |
| HLM | Park Township Airport | Holland | Small Airport | |
| HMT | KHMT | Hemet Ryan Airport | Hemet | Small Airport |
| HNB | KHNB | Huntingburg Airport | Huntingburg | Small Airport |
| HNC | KHSE | Billy Mitchell Airport | Hatteras | Small Airport |
| HNH | PAOH | Hoonah Airport | Hoonah | Small Airport |
| HPB | PAHP | Hooper Bay Airport | Hooper Bay | Small Airport |
| HPT | KHPT | Hampton Municipal Airport | Hampton | Small Airport |
| HPV | Princeville Airport | Hanalei | Small Airport | |
| HPY | KHPY | Baytown Airport | Baytown | Small Airport |
| HSB | KHSB | Harrisburg-Raleigh Airport | Harrisburg | Small Airport |
| HSH | KHND | Henderson Executive Airport | Las Vegas | Small Airport |
| HSI | KHSI | Hastings Municipal Airport | Hastings | Small Airport |
| HSP | KHSP | Ingalls Field | Hot Springs | Small Airport |
| HTH | KHTH | Hawthorne Industrial Airport | Hawthorne | Small Airport |
| HTL | KHTL | Roscommon County - Blodgett Memorial Airport | Houghton Lake | Small Airport |
| HTO | KJPX | Town of East Hampton Airport | East Hampton | Small Airport |
| HTW | KHTW | Lawrence County Airpark | South Point | Small Airport |
| HUD | Humboldt Municipal Airport | Humboldt | Small Airport | |
| HUJ | KHHW | Stan Stamper Municipal Airport | Hugo | Small Airport |
| HUM | KHUM | Houma Terrebonne Airport | Houma | Small Airport |
| HUS | PAHU | Hughes Airport | Hughes | Small Airport |
| HVE | KHVE | Hanksville Airport | Hanksville | Small Airport |
| HVS | KHVS | Hartsville Regional Airport | Hartsville | Small Airport |
| HWD | KHWD | Hayward Executive Airport | Hayward | Small Airport |
| HZL | KHZL | Hazleton Municipal Airport | Hazleton | Small Airport |
| ICL | KICL | Schenck Field | Clarinda | Small Airport |
| ICS | Cascade Airport | Cascade | Small Airport | |
| ICY | Icy Bay Airport | Icy Bay | Small Airport | |
| IDG | KIDG | Ida Grove Municipal Airport | Ida Grove | Small Airport |
| IDH | KGIC | Idaho County Airport | Grangeville | Small Airport |
| IDI | KIDI | Indiana County–Jimmy Stewart Airport | Indiana | Small Airport |
| IDP | KIDP | Independence Municipal Airport | Independence | Small Airport |
| IFA | KIFA | Iowa Falls Municipal Airport | Iowa Falls | Small Airport |
| IGG | PAIG | Igiugig Airport | Igiugig | Small Airport |
| IJX | KIJX | Jacksonville Municipal Airport | Jacksonville | Small Airport |
| IKB | KUKF | Wilkes County Airport | North Wilkesboro | Small Airport |
| IKO | PAKO | Nikolski Air Station | Nikolski | Small Airport |
| ILE | KILE | Skylark Field | Killeen | Small Airport |
| ILL | KBDH | Willmar Municipal Airport John L Rice Field (2006) | Willmar | Small Airport |
| IML | KIML | Imperial Municipal Airport | Imperial | Small Airport |
| IMM | KIMM | Immokalee Regional Airport | Immokalee | Small Airport |
| INS | KINS | Creech Air Force Base | Indian Springs | Small Airport |
| IOW | KIOW | Iowa City Municipal Airport | Iowa City | Small Airport |
| IRB | Iraan Municipal Airport | Iraan | Small Airport | |
| IRC | PACR | Circle City (New) Airport | Circle | Small Airport |
| IRS | KIRS | Kirsch Municipal Airport | Sturgis | Small Airport |
| ISQ | KISQ | Schoolcraft County Airport | Manistique | Small Airport |
| ISS | KIWI | Wiscasset Airport | Wiscasset | Small Airport |
| ISW | KISW | Alexander Field South Wood County Airport | Wisconsin Rapids | Small Airport |
| IUA | Canandaigua Airport | Ontario County IDA | Small Airport | |
| IWD | KIWD | Gogebic Iron County Airport | Ironwood | Small Airport |
| IWS | KIWS | West Houston Airport | Houston | Small Airport |
| IYK | KIYK | Inyokern Airport | Inyokern | Small Airport |
| JAS | KJAS | Jasper County Airport Bell Field | Jasper | Small Airport |
| JCI | KIXD | New Century AirCenter Airport | New Century | Small Airport |
| JCY | LBJ Ranch Airport | Stonewall | Small Airport | |
| JDA | KGCD | Grant County Regional Airport / Ogilvie Field | John Day | Small Airport |
| JDN | KJDN | Jordan Airport | Jordan | Small Airport |
| JEF | KJEF | Jefferson City Memorial Airport | Jefferson City | Small Airport |
| JKV | KJSO | Cherokee County Airport | Jacksonville | Small Airport |
| JLA | Quartz Creek Airport | Cooper Landing | Small Airport | |
| JOT | KJOT | Joliet Regional Airport | Joliet | Small Airport |
| JVI | Central Jersey Regional Airport | Manville | Small Airport | |
| JVL | KJVL | Southern Wisconsin Regional Airport | Janesville | Small Airport |
| KAL | PAKV | Kaltag Airport | Kaltag | Small Airport |
| KBC | Birch Creek Airport | Birch Creek | Small Airport | |
| KCG | Chignik Airport | Chignik | Small Airport | |
| KCL | Chignik Lagoon Airport | Chignik Flats | Small Airport | |
| KCQ | Chignik Lake Airport | Chignik Lake | Small Airport | |
| KCR | Colorado Creek Airport | Colorado Creek | Small Airport | |
| KDK | PAKD | Kodiak Municipal Airport | Kodiak | Small Airport |
| KEB | Nanwalek Airport | Nanwalek | Small Airport | |
| KEK | Ekwok Airport | Ekwok | Small Airport | |
| KFP | PAKF | False Pass Airport | False Pass | Small Airport |
| KGK | PAJZ | Koliganek Airport | Koliganek | Small Airport |
| KGX | Grayling Airport | Grayling | Small Airport | |
| KGZ | Glacier Creek Airport | Glacier Creek | Small Airport | |
| KIC | KKIC | Mesa Del Rey Airport | King City | Small Airport |
| KIP | KCWC | Kickapoo Downtown Airport | Wichita Falls | Small Airport |
| KKA | PAKK | Koyuk Alfred Adams Airport | Koyuk | Small Airport |
| KKH | PADY | Kongiganak Airport | Kongiganak | Small Airport |
| KKI | Akiachak Airport | Akiachak | Small Airport | |
| KKK | Kalakaket Creek AS Airport | Kalakaket Creek | Small Airport | |
| KKT | Kentland Municipal Airport | Kentland | Small Airport | |
| KKU | Ekuk Airport | Ekuk | Small Airport | |
| KLG | PALG | Kalskag Airport | Kalskag | Small Airport |
| KLL | Levelock Airport | Levelock | Small Airport | |
| KLN | PALB | Larsen Bay Airport | Larsen Bay | Small Airport |
| KMO | PAMB | Manokotak Airport | Manokotak | Small Airport |
| KNB | KKNB | Kanab Municipal Airport | Kanab | Small Airport |
| KNK | PFKK | Kokhanok Airport | Kokhanok | Small Airport |
| KNT | KTKX | Kennett Memorial Airport | Kennett | Small Airport |
| KNW | PANW | New Stuyahok Airport | New Stuyahok | Small Airport |
| KOT | PFKO | Kotlik Airport | Kotlik | Small Airport |
| KOZ | Ouzinkie Airport | Ouzinkie | Small Airport | |
| KPN | PAKI | Kipnuk Airport | Kipnuk | Small Airport |
| KPT | Jackpot Airport/Hayden Field | Jackpot | Small Airport | |
| KPV | PAPE | Perryville Airport | Perryville | Small Airport |
| KQA | Akutan Airport | Akutan | Small Airport | |
| KSM | PASM | St Mary's Airport | St Mary's | Small Airport |
| KTS | PFKT | Brevig Mission Airport | Brevig Mission | Small Airport |
| KUK | PFKA | Kasigluk Airport | Kasigluk | Small Airport |
| KVC | PAVC | King Cove Airport | King Cove | Small Airport |
| KVL | PAVL | Kivalina Airport | Kivalina | Small Airport |
| KWK | PAGG | Kwigillingok Airport | Kwigillingok | Small Airport |
| KWN | PAQH | Quinhagak Airport | Quinhagak | Small Airport |
| KWT | PFKW | Kwethluk Airport | Kwethluk | Small Airport |
| KYK | PAKY | Karluk Airport | Karluk | Small Airport |
| KYO | Tampa North Aero Park Airport | Tampa | Small Airport | |
| KYU | PFKU | Koyukuk Airport | Koyukuk | Small Airport |
| LAM | KLAM | Los Alamos Airport | Los Alamos | Small Airport |
| LCI | KLCI | Laconia Municipal Airport | Laconia / Gilford | Small Airport |
| LCQ | KLCQ | Lake City Gateway Airport | Lake City | Small Airport |
| LDJ | KLDJ | Linden Airport | Linden | Small Airport |
| LDM | KLDM | Mason County Airport | Ludington | Small Airport |
| LEM | KLEM | Lemmon Municipal Airport | Lemmon | Small Airport |
| LEW | KLEW | Auburn Lewiston Municipal Airport | Auburn/Lewiston | Small Airport |
| LFN | KLHZ | Triangle North Executive Airport | Louisburg | Small Airport |
| LGC | KLGC | LaGrange Callaway Airport | LaGrange | Small Airport |
| LGD | KLGD | La Grande/Union County Airport | La Grande | Small Airport |
| LGF | KLGF | Laguna Army Airfield | Yuma Proving Ground(Yuma) | Small Airport |
| LHV | KLHV | William T. Piper Memorial Airport | Lock Haven | Small Airport |
| LIC | KLIC | Limon Municipal Airport | Limon | Small Airport |
| LIV | Livengood Camp Airport | Livengood | Small Airport | |
| LIY | KLHW | MidCoast Regional Airport at Wright Army Airfield | Hinesville | Small Airport |
| LIZ | Loring International Airport | Limestone | Small Airport | |
| LKK | PAKL | Kulik Lake Airport | Kulik Lake | Small Airport |
| LKP | KLKP | Lake Placid Airport | Lake Placid | Small Airport |
| LKV | KLKV | Lake County Airport | Lakeview | Small Airport |
| LLX | KCDA | Caledonia County Airport | Lyndonville | Small Airport |
| LLY | KVAY | South Jersey Regional Airport | Lumberton | Small Airport |
| LMA | PAMH | Minchumina Airport | Minchumina | Small Airport |
| LMS | KLMS | Louisville Winston County Airport | Louisville | Small Airport |
| LNA | KLNA | Palm Beach County Park Airport | West Palm Beach | Small Airport |
| LNI | PALN | Point Lonely Short Range Radar Site Airfield | Point Lonely | Small Airport |
| LNN | KLNN | Lake County Executive Airport | Willoughby | Small Airport |
| LNP | KLNP | Lonesome Pine Airport | Wise | Small Airport |
| LNR | KLNR | Tri-County Regional Airport | Spring Green | Small Airport |
| LOT | KLOT | Lewis University Airport | Chicago/Romeoville | Small Airport |
| LOW | KLKU | Louisa County Airport / Freeman Field | Louisa | Small Airport |
| LPC | KLPC | Lompoc Airport | Lompoc | Small Airport |
| LPO | KPPO | La Porte Municipal Airport | La Porte | Small Airport |
| LPS | Lopez Island Airport | Lopez | Small Airport | |
| LQK | KLQK | Pickens County Airport | Pickens | Small Airport |
| LRJ | KLRJ | Le Mars Municipal Airport | Le Mars | Small Airport |
| LSB | KLSB | Lordsburg Municipal Airport | Lordsburg | Small Airport |
| LSK | KLSK | Lusk Municipal Airport | Lusk | Small Airport |
| LSN | KLSN | Los Banos Municipal Airport | Los Banos | Small Airport |
| LTW | St. Mary's County Regional Airport | California | Small Airport | |
| LUL | KLUL | Hesler Noble Field | Laurel | Small Airport |
| LUP | PHLU | Kalaupapa Airport | Kalaupapa | Small Airport |
| LVD | Lime Village Airport | Lime Village | Small Airport | |
| LVK | KLVK | Livermore Municipal Airport | Livermore | Small Airport |
| LVL | KLVL | Brunswick Municipal Airport | Lawrenceville | Small Airport |
| LWC | KLWC | Lawrence Municipal Airport | Lawrence | Small Airport |
| LWL | KLWL | Wells Municipal Airport/Harriet Field | Wells | Small Airport |
| LWV | KLWV | Lawrenceville Vincennes International Airport | Lawrenceville | Small Airport |
| LXN | KLXN | Jim Kelly Field | Lexington | Small Airport |
| LXV | KLXV | Lake County Airport | Leadville | Small Airport |
| LYO | KLYO | Lyons-Rice County Municipal Airport | Lyons | Small Airport |
| LZU | KLZU | Gwinnett County Briscoe Field | Lawrenceville | Small Airport |
| MAC | KMAC | Macon Downtown Airport | Macon | Small Airport |
| MAE | KMAE | Madera Municipal Airport | Madera | Small Airport |
| MAW | KMAW | Malden Regional Airport | Malden | Small Airport |
| MBL | KMBL | Manistee County Blacker Airport | Manistee | Small Airport |
| MBY | KMBY | Omar N Bradley Airport | Moberly | Small Airport |
| MCD | KMCD | Mackinac Island Airport | Mackinac Island | Small Airport |
| MCL | PAIN | Denali National Park Airport | Denali Park | Small Airport |
| MDD | KMDD | Midland Airpark | Midland | Small Airport |
| MDF | KMDZ | Taylor County Airport | Medford | Small Airport |
| MDJ | Madras Municipal Airport | Madras | Small Airport | |
| MDN | KIMS | Madison Municipal Airport | Madison | Small Airport |
| MDO | PAMD | Middleton Island Airport | Middleton Island | Small Airport |
| MEJ | KGKJ | Port Meadville Airport | Meadville | Small Airport |
| MEO | KMQI | Dare County Regional Airport | Manteo | Small Airport |
| MEV | KMEV | Minden-Tahoe Airport | Minden | Small Airport |
| MFI | KMFI | Marshfield Municipal Airport | Marshfield | Small Airport |
| MFV | KMFV | Accomack County Airport | Melfa | Small Airport |
| MGI | National Wildlife Refuge Airport | Matagorda Island | Small Airport | |
| MGJ | KMGJ | Orange County Airport | Montgomery | Small Airport |
| MGR | KMGR | Moultrie Municipal Airport | Moultrie | Small Airport |
| MGY | KMGY | Dayton-Wright Brothers Airport | Dayton | Small Airport |
| MHE | KMHE | Mitchell Municipal Airport | Mitchell | Small Airport |
| MHL | KMHL | Marshall Memorial Municipal Airport | Marshall | Small Airport |
| MHN | Hooker County Airport | Mullen | Small Airport | |
| MHS | Dunsmuir Muni-Mott Airport | Dunsmuir | Small Airport | |
| MIC | KMIC | Crystal Airport | Minneapolis | Small Airport |
| MIF | Roy Hurd Memorial Airport | Monahans | Small Airport | |
| MIO | KMIO | Miami Municipal Airport | Miami | Small Airport |
| MIQ | KMLE | Millard Airport | Omaha | Small Airport |
| MIT | KMIT | Shafter Airport - Minter Field | Shafter | Small Airport |
| MIW | KMIW | Marshalltown Municipal Airport | Marshalltown | Small Airport |
| MJQ | KMJQ | Jackson Municipal Airport | Jackson | Small Airport |
| MJX | KMJX | Ocean County Airport | Toms River | Small Airport |
| MKO | KMKO | Muskogee-Davis Regional Airport | Muskogee | Small Airport |
| MKT | KMKT | Mankato Regional Airport | Mankato | Small Airport |
| MLD | KMLD | Malad City Airport | Malad City | Small Airport |
| MLF | KMLF | Milford Municipal-Ben and Judy Briscoe Field | Milford | Small Airport |
| MLJ | KMLJ | Baldwin County Regional Airport | Milledgeville | Small Airport |
| MLK | Malta Airport | Malta | Small Airport | |
| MLL | PADM | Marshall Don Hunter Sr Airport | Marshall | Small Airport |
| MLT | KMLT | Millinocket Municipal Airport | Millinocket | Small Airport |
| MLY | PAML | Manley Hot Springs Airport | Manley Hot Springs | Small Airport |
| MMH | KMMH | Mammoth Yosemite Airport | Mammoth Lakes | Small Airport |
| MMI | KMMI | McMinn County Airport | Athens | Small Airport |
| MML | KMML | Southwest Minnesota Regional Airport - Marshall/Ryan Field | Marshall | Small Airport |
| MMN | Minute Man Air Field | Stow | Small Airport | |
| MMS | KMMS | Selfs Airport | Marks | Small Airport |
| MNM | KMNM | Menominee–Marinette Twin County Airport | Menominee | Small Airport |
| MNN | KMNN | Marion Municipal Airport | Marion | Small Airport |
| MNT | Minto Al Wright Airport | Minto | Small Airport | |
| MOP | KMOP | Mount Pleasant Municipal Airport | Mount Pleasant | Small Airport |
| MOR | KMOR | Morristown Regional Airport | Morristown | Small Airport |
| MOS | Moses Point Airport | Elim | Small Airport | |
| MOU | PAMO | Mountain Village Airport | Mountain Village | Small Airport |
| MOX | KMOX | Morris Municipal Airport Charlie Schmidt Field | Morris | Small Airport |
| MPJ | KMPJ | Petit Jean Park Airport | Morrilton | Small Airport |
| MPO | KMPO | Pocono Mountains Municipal Airport | Mount Pocono | Small Airport |
| MPR | KMPR | Mc Pherson Airport | Mc Pherson | Small Airport |
| MPS | KOSA | Mount Pleasant Regional Airport | Mount Pleasant | Small Airport |
| MPZ | KMPZ | Mount Pleasant Municipal Airport | Mount Pleasant | Small Airport |
| MQB | KMQB | Macomb Municipal Airport | Macomb | Small Airport |
| MQW | KMQW | Telfair Wheeler Airport | Mc Rae | Small Airport |
| MRC | KMRC | Maury County Airport | Columbia/Mount Pleasant | Small Airport |
| MRF | KMRF | Marfa Municipal Airport | Marfa | Small Airport |
| MRK | KMKY | Marco Island Executive Airport | Marco Island | Small Airport |
| MRN | KMRN | Foothills Regional Airport | Morganton | Small Airport |
| MSC | KFFZ | Falcon Field | Mesa | Small Airport |
| MSV | KMSV | Sullivan County International Airport | Monticello | Small Airport |
| MTO | KMTO | Coles County Memorial Airport | Mattoon | Small Airport |
| MTP | KMTP | Montauk Airport | Montauk | Small Airport |
| MTW | KMTW | Manitowoc County Airport | Manitowoc | Small Airport |
| MTX | Metro Field | Fairbanks | Small Airport | |
| MUL | KMUL | Spence Airport | Moultrie | Small Airport |
| MUT | KMUT | Muscatine Municipal Airport | Muscatine | Small Airport |
| MVC | KMVC | Monroe County Aeroplex Airport | Monroeville | Small Airport |
| MVE | KMVE | Montevideo Chippewa County Airport | Montevideo | Small Airport |
| MVL | KMVL | Morrisville-Stowe State Airport | Morrisville | Small Airport |
| MVM | Kayenta Airport | Kayenta | Small Airport | |
| MVN | KMVN | Mount Vernon Outland Airport | Mount Vernon | Small Airport |
| MVW | KBVS | Skagit Regional Airport | Burlington | Small Airport |
| MVY | KMVY | Martha's Vineyard Airport | Martha's Vineyard | Small Airport |
| MWC | KMWC | Lawrence J Timmerman Airport | Milwaukee | Small Airport |
| MWM | KMWM | Windom Municipal Airport | Windom | Small Airport |
| MWO | KMWO | Middletown Regional Airport | Middletown | Small Airport |
| MXA | KMXA | Manila Municipal Airport | Manila | Small Airport |
| MXC | Monticello Airport | Monticello | Small Airport | |
| MXE | KMEB | Laurinburg Maxton Airport | Maxton | Small Airport |
| MXO | KMXO | Monticello Regional Airport | Monticello | Small Airport |
| MXY | PAMX | Mc Carthy Airport | Mccarthy | Small Airport |
| MYF | KMYF | Montgomery-Gibbs Executive Airport | San Diego | Small Airport |
| MYH | Marble Canyon Airport | Marble Canyon | Small Airport | |
| MYK | May Creek Airport | May Creek | Small Airport | |
| MZJ | KMZJ | Pinal Airpark | Marana | Small Airport |
| MZZ | KMZZ | Marion Municipal Airport | Marion | Small Airport |
| NCN | PFCB | Chenega Bay Airport | Chenega | Small Airport |
| NEN | KNEN | Whitehouse Naval Outlying Field | Jacksonville | Small Airport |
| NGW | KNGW | Cabaniss Field Naval Outlying Landing Field | Corpus Christi | Small Airport |
| NHX | KNBJ | Naval Outlying Field Barin | Foley | Small Airport |
| NIB | PAFS | Nikolai Airport | Nikolai | Small Airport |
| NIN | Ninilchik Airport | Ninilchik | Small Airport | |
| NIR | Chase Field Industrial Airport | Beeville | Small Airport | |
| NLE | Jerry Tyler Memorial Airport | Niles | Small Airport | |
| NLG | PAOU | Nelson Lagoon Airport | Nelson Lagoon | Small Airport |
| NLN | Kneeland Airport | Kneeland | Small Airport | |
| NME | PAGT | Nightmute Airport | Nightmute | Small Airport |
| NNK | Naknek Airport | Naknek | Small Airport | |
| NNL | PANO | Nondalton Airport | Nondalton | Small Airport |
| NOT | KDVO | Marin County Airport - Gnoss Field | Novato | Small Airport |
| NPH | J. Randy McKnight Nephi Municipal Airport | Nephi | Small Airport | |
| NRI | Grand Lake Regional Airport | Afton | Small Airport | |
| NRS | KNRS | Naval Outlying Field Imperial Beach (Ream Field) | Imperial Beach | Small Airport |
| NSL | KDVP | Slayton Municipal Airport | Slayton | Small Airport |
| NTJ | Manti-Ephraim Airport | Manti | Small Airport | |
| NUL | PANU | Nulato Airport | Nulato | Small Airport |
| NUP | Nunapitchuk Airport | Nunapitchuk | Small Airport | |
| NVD | KNVD | Nevada Municipal Airport | Nevada | Small Airport |
| NVN | Nervino Airport | Beckwourth | Small Airport | |
| NWH | Parlin Field | Newport | Small Airport | |
| OAR | KOAR | Marina Municipal Airport | Marina | Small Airport |
| OBE | KOBE | Okeechobee County Airport | Okeechobee | Small Airport |
| OBU | PAOB | Kobuk Airport | Kobuk | Small Airport |
| OCF | KOCF | Ocala International Airport - Jim Taylor Field | Ocala | Small Airport |
| OCH | KOCH | A L Mangham Jr. Regional Airport | Nacogdoches | Small Airport |
| OCW | KOCW | Warren Field | Washington | Small Airport |
| ODC | Oakdale Airport | Oakdale | Small Airport | |
| ODM | Garrett County Airport | Accident | Small Airport | |
| ODT | Odessa Schlemeyer Field | Odessa | Small Airport | |
| ODW | KOKH | AJ Eisenberg Airport | Oak Harbor | Small Airport |
| OEA | O'Neal Airport | Lawrenceville | Small Airport | |
| OEO | KOEO | L O Simenstad Municipal Airport | Osceola | Small Airport |
| OGA | KOGA | Ogallala Municipal Airport Searle Field | Ogallala | Small Airport |
| OIC | KOIC | Lt Warren Eaton Airport | Norwich | Small Airport |
| OJC | KOJC | Johnson County Executive Airport | Olathe | Small Airport |
| OKK | KOKK | Kokomo Municipal Airport | Kokomo | Small Airport |
| OKM | KOKM | Okmulgee Regional Airport | Okmulgee | Small Airport |
| OKS | KOKS | Garden County Airport/King Rhiley Field | Oshkosh | Small Airport |
| OLD | KOLD | Dewitt Field - Old Town Municipal Airport | Old Town | Small Airport |
| OLE | KOLE | Cattaraugus County-Olean Airport | Olean | Small Airport |
| OLH | Old Harbor Airport | Old Harbor | Small Airport | |
| OLV | KOLV | Olive Branch Airport | Olive Branch | Small Airport |
| OLY | KOLY | Olney Noble Airport | Olney-Noble | Small Airport |
| OMK | KOMK | Omak Airport | Omak | Small Airport |
| ONA | KONA | Winona Municipal Airport Max Conrad Field | Winona | Small Airport |
| ONH | Albert S Nader Regional Airport | Oneonta | Small Airport | |
| ONL | KONL | O'Neill Municipal Airport–John L Baker Field | O'Neill | Small Airport |
| ONM | KONM | Socorro Municipal Airport | Socorro | Small Airport |
| ONY | KONY | Olney Municipal Airport | Olney | Small Airport |
| OOA | KOOA | Oskaloosa Municipal Airport | Cedar | Small Airport |
| OOK | PAOO | Toksook Bay Airport | Toksook Bay | Small Airport |
| OPL | KOPL | St Landry Parish Ahart Field | Opelousas | Small Airport |
| ORI | Port Lions Airport | Port Lions | Small Airport | |
| ORV | PFNO | Robert (Bob) Curtis Memorial Airport | Noorvik | Small Airport |
| OSB | Grand Glaize Osage Beach Airport | Osage Beach | Small Airport | |
| OSC | KOSC | Oscoda Wurtsmith Airport | Oscoda | Small Airport |
| OSX | KOSX | Kosciusko Attala County Airport | Kosciusko | Small Airport |
| OTG | KOTG | Worthington Municipal Airport | Worthington | Small Airport |
| OTK | KTMK | Tillamook Airport | Tillamook | Small Airport |
| OTN | Ed-Air Airport | Oaktown | Small Airport | |
| OTS | Anacortes Airport | Anacortes | Small Airport | |
| OUN | KOUN | University of Oklahoma Westheimer Airport | Norman | Small Airport |
| OVE | KOVE | Oroville Municipal Airport | Oroville | Small Airport |
| OWA | KOWA | Owatonna Degner Regional Airport | Owatonna | Small Airport |
| OWK | KOWK | Central Maine/Norridgewock Airport | Norridgewock | Small Airport |
| OXC | KOXC | Waterbury Oxford Airport | Oxford | Small Airport |
| OXD | KOXD | Miami University Airport | Oxford | Small Airport |
| OZA | KOZA | Ozona Municipal Airport | Ozona | Small Airport |
| PAK | PHPA | Port Allen Airport | Hanapepe | Small Airport |
| PCA | PAOC | Portage Creek Airport | Portage Creek | Small Airport |
| PCD | KPDC | Prairie Du Chien Municipal Airport | Prairie Du Chien | Small Airport |
| PCT | Princeton Airport | Princeton/Rocky Hill | Small Airport | |
| PCU | Poplarville Pearl River County Airport | Poplarville | Small Airport | |
| PDB | Pedro Bay Airport | Pedro Bay | Small Airport | |
| PEQ | KPEQ | Pecos Municipal Airport | Pecos | Small Airport |
| PFC | KPFC | Pacific City State Airport | Pacific City | Small Airport |
| PGC | Grant County Airport | Petersburg | Small Airport | |
| PGL | KPQL | Trent Lott International Airport | Pascagoula | Small Airport |
| PGM | Port Graham Airport | Port Graham | Small Airport | |
| PGO | KPSO | Stevens Field | Pagosa Springs | Small Airport |
| PGR | KPGR | Kirk Field | Paragould | Small Airport |
| PGS | Grand Canyon Caverns Airport | Peach Springs | Small Airport | |
| PHD | KPHD | Harry Clever Field | New Philadelphia | Small Airport |
| PHK | KPHK | Palm Beach County Glades Airport | Pahokee | Small Airport |
| PHN | KPHN | St Clair County International Airport | Port Huron | Small Airport |
| PHO | PAPO | Point Hope Airport | Point Hope | Small Airport |
| PHP | KPHP | Philip Airport | Philip | Small Airport |
| PHT | KPHT | Henry County Airport | Paris | Small Airport |
| PIM | KPIM | Harris County Airport | Pine Mountain | Small Airport |
| PIP | PAPN | Pilot Point Airport | Pilot Point | Small Airport |
| PJB | KPAN | Payson Airport | Payson | Small Airport |
| PKA | PAPK | Napaskiak Airport | Napaskiak | Small Airport |
| PKD | KPKD | Park Rapids Municipal Airport Konshok Field | Park Rapids | Small Airport |
| PKF | KPKF | Park Falls Municipal Airport | Park Falls | Small Airport |
| PLK | KPLK | M. Graham Clark Downtown Airport | Branson / Hollister | Small Airport |
| PLR | KPLR | St Clair County Airport | Pell City | Small Airport |
| PLY | Plymouth Municipal Airport | Plymouth | Small Airport | |
| PMB | KPMB | Pembina Municipal Airport | Pembina | Small Airport |
| PMH | KPMH | Greater Portsmouth Regional Airport | Portsmouth | Small Airport |
| PML | PAAL | Port Moller Airport | Cold Bay | Small Airport |
| PNN | KPNN | Princeton Municipal Airport | Princeton | Small Airport |
| PNU | Panguitch Municipal Airport | Panguitch | Small Airport | |
| POC | KPOC | Brackett Field | La Verne | Small Airport |
| POF | KPOF | Poplar Bluff Municipal Airport | Poplar Bluff | Small Airport |
| POH | KPOH | Pocahontas Municipal Airport | Pocahontas | Small Airport |
| POY | KPOY | Powell Municipal Airport | Powell | Small Airport |
| PPA | KPPA | Perry Lefors Field | Pampa | Small Airport |
| PPC | PAPR | Prospect Creek Airport | Prospect Creek | Small Airport |
| PPF | KPPF | Tri-City Airport | Parsons | Small Airport |
| PPM | KPMP | Pompano Beach Airpark | Pompano Beach | Small Airport |
| PQS | Pilot Station Airport | Pilot Station | Small Airport | |
| PRO | KPRO | Perry Municipal Airport | Perry | Small Airport |
| PRW | Prentice Airport | Prentice | Small Airport | |
| PRZ | Prineville Airport | Prineville | Small Airport | |
| PSB | KPSB | Mid-State Regional Airport | Philipsburg | Small Airport |
| PSF | KPSF | Pittsfield Municipal Airport | Pittsfield | Small Airport |
| PSK | KPSK | New River Valley Airport | Dublin | Small Airport |
| PSN | KPSN | Palestine Municipal Airport | Palestine | Small Airport |
| PSX | KPSX | Palacios Municipal Airport | Palacios | Small Airport |
| PTA | PALJ | Port Alsworth Airport | Port Alsworth | Small Airport |
| PTB | KPTB | Dinwiddie County Airport | Petersburg | Small Airport |
| PTN | KPTN | Harry P Williams Memorial Airport | Patterson | Small Airport |
| PTS | KPTS | Atkinson Municipal Airport | Pittsburg | Small Airport |
| PTT | KPTT | Pratt Regional Airport | Pratt | Small Airport |
| PTV | KPTV | Porterville Municipal Airport | Porterville | Small Airport |
| PTW | KPTW | Heritage Field | Pottstown | Small Airport |
| PUC | KPUC | Carbon County Regional Airport / Buck Davis Field | Price | Small Airport |
| PVC | KPVC | Provincetown Municipal Airport | Provincetown | Small Airport |
| PVF | KPVF | Placerville Airport | Placerville | Small Airport |
| PVL | KPBX | Pike County Airport Hatcher Field | Pikeville | Small Airport |
| PVW | KPVW | Hale County Airport | Plainview | Small Airport |
| PWA | KPWA | Wiley Post Airport | Oklahoma City | Small Airport |
| PWD | KPWD | Sher-Wood Airport | Plentywood | Small Airport |
| PXL | Polacca Airport | Polacca | Small Airport | |
| PYM | KPYM | Plymouth Municipal Airport | Plymouth | Small Airport |
| PYS | Paradise Skypark Airport | Paradise | Small Airport | |
| RAC | KRAC | John H Batten Airport | Racine | Small Airport |
| RBD | KRBD | Dallas Executive Airport | Dallas | Small Airport |
| RBF | Big Bear City Airport | Big Bear | Small Airport | |
| RBG | KRBG | Roseburg Regional Airport | Roseburg | Small Airport |
| RBK | French Valley Airport | Murrieta | Small Airport | |
| RBW | KRBW | Lowcountry Regional Airport | Walterboro | Small Airport |
| RCE | Roche Harbor Airport | Roche Harbor | Small Airport | |
| RCK | KRCK | H H Coffield Regional Airport | Rockdale | Small Airport |
| RCR | KRCR | Fulton County Airport | Rochester | Small Airport |
| RDB | PADG | Red Dog Airport | Red Dog | Small Airport |
| RDV | Red Devil Airport | Red Devil | Small Airport | |
| RED | KRVL | Mifflin County Airport | Reedsville | Small Airport |
| REE | Reese Airpark | Lubbock | Small Airport | |
| REO | KREO | Rome State Airport | Rome | Small Airport |
| RFG | KRFG | Rooke Field | Refugio | Small Airport |
| RFK | Rollang Field | Rolling Fork | Small Airport | |
| RGR | Ranger Municipal Airport | Ranger | Small Airport | |
| RHV | KRHV | Reid-Hillview Airport of Santa Clara County | San Jose | Small Airport |
| RID | KRID | Richmond Municipal Airport | Richmond | Small Airport |
| RIE | KRPD | Rice Lake Regional Airport - Carl's Field | Rice Lake | Small Airport |
| RIF | KRIF | Richfield Municipal Airport | Richfield | Small Airport |
| RIR | KRIR | Flabob Airport | Riverside | Small Airport |
| RKH | KUZA | Rock Hill - York County Airport | Rock Hill | Small Airport |
| RKP | KRKP | Aransas County Airport | Rockport | Small Airport |
| RKR | KRKR | Robert S Kerr Airport | Poteau | Small Airport |
| RKW | KRKW | Rockwood Municipal Airport | Rockwood | Small Airport |
| RLA | Rolla Downtown Airport | Rolla | Small Airport | |
| RLD | KRLD | Richland Airport | Richland | Small Airport |
| RMP | Rampart Airport | Rampart | Small Airport | |
| RMY | KMPI | Mariposa Yosemite Airport | Mariposa | Small Airport |
| RNC | KRNC | Warren County Memorial Airport | Mc Minnville | Small Airport |
| RNT | KRNT | Renton Municipal Airport | Renton | Small Airport |
| RNZ | KRZL | Jasper County Airport | Rensselaer | Small Airport |
| ROF | Montague-Yreka Rohrer Field | Montague | Small Airport | |
| ROG | KROG | Rogers Municipal Airport-Carter Field | Rogers | Small Airport |
| ROL | Roosevelt Municipal Airport | Roosevelt | Small Airport | |
| ROX | KROX | Roseau Municipal Rudy Billberg Field | Roseau | Small Airport |
| RPX | KRPX | Roundup Airport | Roundup | Small Airport |
| RQO | El Reno Regional Airport | El Reno | Small Airport | |
| RRL | KRRL | Merrill Municipal Airport | Merrill | Small Airport |
| RRT | KRRT | Warroad International Memorial Airport | Warroad | Small Airport |
| RSH | PARS | Russian Mission Airport | Russian Mission | Small Airport |
| RSN | KRSN | Ruston Regional Airport | Ruston | Small Airport |
| RTL | Spirit Lake Municipal Airport | Okoboji | Small Airport | |
| RTN | KRTN | Raton Municipal Airport / Crews Field | Raton | Small Airport |
| RVR | Green River Municipal Airport | Green River | Small Airport | |
| RXE | KRXE | Rexburg Madison County Airport | Rexburg | Small Airport |
| SAA | KSAA | Shively Field | Saratoga | Small Airport |
| SAD | KSAD | Safford Regional Airport | Safford | Small Airport |
| SAR | KSAR | Sparta Community Airport - Hunter Field | Sparta | Small Airport |
| SAS | KSAS | Salton Sea Airport | Salton City | Small Airport |
| SBM | KSBM | Sheboygan County Memorial Airport | Sheboygan | Small Airport |
| SBO | Salina Gunnison Airport | Salina | Small Airport | |
| SBS | KSBS | Steamboat Springs Bob Adams Field | Steamboat Springs | Small Airport |
| SBX | KSBX | Shelby Airport | Shelby | Small Airport |
| SCB | KSCB | Scribner State Airport | Scribner | Small Airport |
| SCF | KSDL | Scottsdale Airport | Scottsdale | Small Airport |
| SCM | PACM | Scammon Bay Airport | Scammon Bay | Small Airport |
| SDX | KSEZ | Sedona Airport | Sedona | Small Airport |
| SEE | KSEE | Gillespie Field | San Diego/El Cajon | Small Airport |
| SEF | KSEF | Sebring Regional Airport | Sebring | Small Airport |
| SEG | KSEG | Penn Valley Airport | Selinsgrove | Small Airport |
| SEM | KSEM | Craig Field | Selma | Small Airport |
| SEP | KSEP | Stephenville Clark Regional Airport | Stephenville | Small Airport |
| SER | KSER | Freeman Municipal Airport | Seymour | Small Airport |
| SFM | KSFM | Sanford Seacoast Regional Airport | Sanford | Small Airport |
| SFZ | KSFZ | North Central State Airport | Pawtucket | Small Airport |
| SGT | KSGT | Stuttgart Municipal Airport / Carl Humphrey Field | Stuttgart | Small Airport |
| SGY | PAGY | Skagway Airport | Skagway | Small Airport |
| SHG | PAGH | Shungnak Airport | Shungnak | Small Airport |
| SHH | PASH | Shishmaref Airport | Shishmaref | Small Airport |
| SHN | KSHN | Sanderson Field | Shelton | Small Airport |
| SHX | PAHX | Shageluk Airport | Shageluk | Small Airport |
| SIK | KSIK | Sikeston Memorial Municipal Airport | Sikeston | Small Airport |
| SIV | KSIV | Sullivan County Airport | Sullivan | Small Airport |
| SIY | KSIY | Siskiyou County Airport | Montague | Small Airport |
| SJN | KSJN | St Johns Industrial Air Park | St Johns | Small Airport |
| SKK | PFSH | Shaktoolik Airport | Shaktoolik | Small Airport |
| SKW | PASW | Skwentna Airport | Skwentna | Small Airport |
| SLB | KSLB | Storm Lake Municipal Airport | Storm Lake | Small Airport |
| SLG | KSLG | Smith Field | Siloam Springs | Small Airport |
| SLO | KSLO | Salem–Leckrone Airport | Salem | Small Airport |
| SLQ | PASL | Sleetmute Airport | Sleetmute | Small Airport |
| SLR | KSLR | Sulphur Springs Municipal Airport | Sulphur Springs | Small Airport |
| SLT | KANK | Salida Airport - Harriet Alexander Field | Salida | Small Airport |
| SMD | KSMD | Smith Field | Fort Wayne | Small Airport |
| SMK | PAMK | St Michael Airport | St Michael | Small Airport |
| SMU | PASP | Sheep Mountain Airport | Sheep Mountain | Small Airport |
| SNK | KSNK | Winston Field | Snyder | Small Airport |
| SNL | KSNL | Shawnee Regional Airport | Shawnee | Small Airport |
| SOL | Solomon State Field | Solomon | Small Airport | |
| SOP | KSOP | Moore County Airport | Carthage | Small Airport |
| SOV | PASO | Seldovia Airport | Seldovia | Small Airport |
| SPA | KSPA | Spartanburg Downtown Memorial Airport | Spartanburg | Small Airport |
| SPF | KSPF | Black Hills Airport-Clyde Ice Field | Spearfish | Small Airport |
| SPG | KSPG | Albert Whitted Airport | St Petersburg | Small Airport |
| SPW | KSPW | Spencer Municipal Airport | Spencer | Small Airport |
| SPZ | KASG | Springdale Municipal Airport | Springdale | Small Airport |
| SQA | KIZA | Santa Ynez Airport | Santa Ynez | Small Airport |
| SQI | KSQI | Whiteside County Airport - Joseph H Bittorf Field | Rock Falls | Small Airport |
| SQV | Sequim Valley Airport | Sequim | Small Airport | |
| SRC | KSRC | Searcy Municipal Airport | Searcy | Small Airport |
| SRV | Stony River 2 Airport | Stony River | Small Airport | |
| SRW | KRUQ | Mid-Carolina Regional Airport | Salisbury | Small Airport |
| SSW | Stuart Island Airpark | Friday Harbor | Small Airport | |
| STE | KSTE | Stevens Point Municipal Airport | Stevens Point | Small Airport |
| STK | KSTK | Sterling Municipal Airport | Sterling | Small Airport |
| STQ | KOYM | St Marys Municipal Airport | St Marys | Small Airport |
| SUA | KSUA | Witham Field | Stuart | Small Airport |
| SUD | KSUD | Stroud Municipal Airport | Stroud | Small Airport |
| SUE | KSUE | Door County Cherryland Airport | Sturgeon Bay | Small Airport |
| SUM | KSMS | Sumter Airport | Sumter | Small Airport |
| SUO | Sunriver Airport | Sunriver | Small Airport | |
| SUW | KSUW | Richard I Bong Memorial Airport | Superior | Small Airport |
| SVE | KSVE | Susanville Municipal Airport | Susanville | Small Airport |
| SVH | KSVH | Statesville Regional Airport | Statesville | Small Airport |
| SVS | Stevens Village Airport | Stevens Village | Small Airport | |
| SWW | KSWW | Avenger Field | Sweetwater | Small Airport |
| SXP | Nunam Iqua Airport | Nunam Iqua | Small Airport | |
| SXY | Sidney Municipal Airport | Sidney | Small Airport | |
| SYI | KSYI | Bomar Field / Shelbyville Municipal Airport | Shelbyville | Small Airport |
| SYN | KSYN | Stanton Airfield | Dennison | Small Airport |
| SYV | KSYV | Sylvester Airport | Sylvester | Small Airport |
| SZN | KSZN | Santa Cruz Island Airport | Santa Cruz Island | Small Airport |
| SZP | KSZP | Santa Paula Airport | Santa Paula | Small Airport |
| TAD | KTAD | Perry Stokes Airport | Trinidad | Small Airport |
| TAL | PATA | Ralph M Calhoun Memorial Airport | Tanana | Small Airport |
| TBC | Tuba City Airport | Tuba City | Small Airport | |
| TBR | KTBR | Statesboro Bulloch County Airport | Statesboro | Small Airport |
| TCT | PPCT | Takotna Airport | Takotna | Small Airport |
| TDO | KTDO | Ed Carlson Memorial Field South Lewis County Airport | Toledo | Small Airport |
| TDW | KTDW | Tradewind Airport | Amarillo | Small Airport |
| TDZ | KTDZ | Toledo Executive Airport | Toledo | Small Airport |
| TEH | Tetlin Airport | Tetlin | Small Airport | |
| TEK | Tatitlek Airport | Tatitlek | Small Airport | |
| THA | KTHA | Tullahoma Regional Airport William Northern Field | Tullahoma | Small Airport |
| THM | KTHM | Thompson Falls Airport | Thompson Falls | Small Airport |
| THP | Hot Springs County Airport | Thermopolis | Small Airport | |
| THV | KTHV | York Airport | Thomasville | Small Airport |
| TKJ | PFTO | Tok Junction Airport | Tok | Small Airport |
| TLA | PATE | Teller Airport | Teller | Small Airport |
| TLF | Telida Airport | Telida | Small Airport | |
| TLR | KTLR | Mefford Field | Tulare | Small Airport |
| TLT | Tuluksak Airport | Tuluksak | Small Airport | |
| TMA | KTMA | Henry Tift Myers Airport | Tifton | Small Airport |
| TNC | PATC | Tin City Long Range Radar Station Airport | Tin City | Small Airport |
| TNK | Tununak Airport | Tununak | Small Airport | |
| TNP | KTNP | Twentynine Palms Airport | Twentynine Palms | Small Airport |
| TNT | KTNT | Dade Collier Training and Transition Airport | Miami | Small Airport |
| TNU | KTNU | Newton Municipal Airport | Newton | Small Airport |
| TOA | KTOA | Zamperini Field | Torrance | Small Airport |
| TOC | KTOC | Toccoa Airport - R.G. Letourneau Field | Toccoa | Small Airport |
| TOG | PATG | Togiak Airport | Togiak Village | Small Airport |
| TOR | KTOR | Torrington Municipal Airport | Torrington | Small Airport |
| TPF | KTPF | Peter O Knight Airport | Tampa | Small Airport |
| TRH | Trona Airport | Trona | Small Airport | |
| TRL | KTRL | Terrell Municipal Airport | Terrell | Small Airport |
| TRX | KTRX | Trenton Municipal Airport | Trenton | Small Airport |
| TSG | Tanacross Airport | Tanacross | Small Airport | |
| TSP | KTSP | Tehachapi Municipal Airport | Tehachapi | Small Airport |
| TTO | KBTN | Britton Municipal Airport | Britton | Small Airport |
| TUH | Arnold Air Force Base | Manchester | Small Airport | |
| TVI | KTVI | Thomasville Regional Airport | Thomasville | Small Airport |
| TWA | Twin Hills Airport | Twin Hills | Small Airport | |
| TWD | Jefferson County International Airport | Port Townsend | Small Airport | |
| TWE | Taylor Airport | Taylor | Small Airport | |
| TYE | Tyonek Airport | Tyonek | Small Airport | |
| TYZ | KTYL | Taylor Airport | Taylor | Small Airport |
| TZC | KCFS | Tuscola Area Airport | Caro | Small Airport |
| UBS | KUBS | Columbus Lowndes County Airport | Columbus | Small Airport |
| UCC | Yucca Airstrip | Mercury | Small Airport | |
| UCE | Eunice Airport | Eunice | Small Airport | |
| UCY | KUCY | Everett-Stewart Regional Airport | Union City | Small Airport |
| UDD | KUDD | Bermuda Dunes Airport | Bermuda Dunes | Small Airport |
| UES | KUES | Waukesha County Airport | Waukesha | Small Airport |
| UGB | Ugashik Bay Airport | Pilot Point | Small Airport | |
| UGN | KUGN | Waukegan National Airport | Chicago/Waukegan | Small Airport |
| UGS | Ugashik Airport | Ugashik | Small Airport | |
| UIL | KUIL | Quillayute Airport | Quillayute | Small Airport |
| UKN | Waukon Municipal Airport | Waukon | Small Airport | |
| UKT | KUKT | Quakertown Airport | Quakertown | Small Airport |
| ULM | KULM | New Ulm Municipal Airport | New Ulm | Small Airport |
| UMM | PAST | Summit Airport | Cantwell | Small Airport |
| UMT | PAUM | Umiat Airport | Umiat | Small Airport |
| UMZ | Mena Intermountain Municipal Airport | Mena | Small Airport | |
| UNU | KUNU | Dodge County Airport | Juneau | Small Airport |
| UOS | KUOS | Franklin County Airport | Sewanee | Small Airport |
| UPP | PHUP | Upolu Airport | Hawi | Small Airport |
| USC | Union County, Troy Shelton Field | Union | Small Airport | |
| UTM | KUTA | Tunica Municipal Airport | Tunica | Small Airport |
| UUK | PAKU | Ugnu-Kuparuk Airport | Kuparuk | Small Airport |
| UVA | KUVA | Garner Field | Uvalde | Small Airport |
| UWA | Ware Airport | Ware | Small Airport | |
| VAK | PAVA | Chevak Airport | Chevak | Small Airport |
| VCV | KVCV | Southern California Logistics Airport | Victorville | Small Airport |
| VDI | KVDI | Vidalia Regional Airport | Vidalia | Small Airport |
| VEE | PAVE | Venetie Airport | Venetie | Small Airport |
| VEX | Tioga Municipal Airport | Tioga | Small Airport | |
| VHN | KVHN | Culberson County Airport | Van Horn | Small Airport |
| VIH | KVIH | Rolla National Airport | Vichy | Small Airport |
| VJI | KVJI | Virginia Highlands Airport | Abingdon | Small Airport |
| VKS | KVKS | Vicksburg Municipal Airport | Vicksburg | Small Airport |
| VLA | KVLA | Vandalia Municipal Airport | Vandalia | Small Airport |
| VLE | Valle Airport | Grand Canyon | Small Airport | |
| VNC | KVNC | Venice Municipal Airport | Venice | Small Airport |
| VRS | Roy Otten Memorial Airfield | Versailles | Small Airport | |
| VSF | KVSF | Hartness State Airport | North Springfield | Small Airport |
| VYS | KVYS | Illinois Valley Regional Airport Walter A Duncan Field | Peru | Small Airport |
| WAA | PAIW | Wales Airport | Wales | Small Airport |
| WAH | KBWP | Harry Stern Airport | Wahpeton | Small Airport |
| WAL | KWAL | Wallops Flight Facility Airport | Wallops Island | Small Airport |
| WAY | KWAY | Greene County Airport | Waynesburg | Small Airport |
| WBB | Stebbins Airport | Stebbins | Small Airport | |
| WBK | West Branch Community Airport | West Branch | Small Airport | |
| WBQ | PAWB | Beaver Airport | Beaver | Small Airport |
| WBR | KRQB | Roben Hood Airport | Big Rapids | Small Airport |
| WBU | KBDU | Boulder Municipal Airport | Boulder | Small Airport |
| WBW | KWBW | Wilkes Barre Wyoming Valley Airport | Wilkes-Barre | Small Airport |
| WCR | PALR | Chandalar Lake Airport | Chandalar Lake | Small Airport |
| WDG | KWDG | Enid Woodring Regional Airport | Enid | Small Airport |
| WDN | Waldron Airstrip | Eastsound | Small Airport | |
| WDR | KWDR | Barrow County Airport | Winder | Small Airport |
| WEA | KWEA | Parker County Airport | Weatherford | Small Airport |
| WFK | KFVE | Northern Aroostook Regional Airport | Frenchville | Small Airport |
| WGO | KOKV | Winchester Regional Airport | Winchester | Small Airport |
| WHP | KWHP | Whiteman Airport | Pacoima | Small Airport |
| WHT | KARM | Wharton Regional Airport | Wharton | Small Airport |
| WIB | Wilbarger County Airport | Vernon | Small Airport | |
| WLD | KWLD | Strother Field | Winfield / Arkansas City | Small Airport |
| WLK | PASK | Selawik Airport | Selawik | Small Airport |
| WLW | KWLW | Willows Glenn County Airport | Willows | Small Airport |
| WMO | PAWM | White Mountain Airport | White Mountain | Small Airport |
| WNA | PANA | Napakiak Airport | Napakiak | Small Airport |
| WOW | PAUO | Willow Airport | Willow | Small Airport |
| WPO | North Fork Valley Airport | Paonia | Small Airport | |
| WSF | PACS | Cape Sarichef Airport | Cape Sarichef | Small Airport |
| WSG | KAFJ | Washington County Airport | Washington | Small Airport |
| WSH | KHWV | Brookhaven Calabro Airport | Shirley | Small Airport |
| WSM | Wiseman Airport | Wiseman | Small Airport | |
| WSN | PFWS | South Naknek Number 2 Airport | South Naknek | Small Airport |
| WTK | PAWN | Noatak Airport | Noatak | Small Airport |
| WTL | Tuntutuliak Airport | Tuntutuliak | Small Airport | |
| WTR | Whiteriver Airport | Whiteriver | Small Airport | |
| WVI | KWVI | Watsonville Municipal Airport | Watsonville | Small Airport |
| WVL | KWVL | Waterville Robert Lafleur Airport | Waterville | Small Airport |
| WWT | PAEW | Mertarvik Airport | Mertarvik | Small Airport |
| XES | Grand Geneva Resort Airport | Lake Geneva | Small Airport | |
| XFT | KBPD | Big Pine Sands STOLGround | Big Pine Key, Florida | Small Airport |
| XMD | KMDS | Madison Municipal Airport | Madison | Small Airport |
| XPR | KIEN | Pine Ridge Airport | Pine Ridge | Small Airport |
| XSD | KTNX | Tonopah Test Range Airport | Tonopah | Small Airport |
| ZNC | Nyac Airport | Nyac | Small Airport | |
| ZPH | KZPH | Zephyrhills Municipal Airport | Zephyrhills | Small Airport |