| AA Bere Tallo (Haliwen) Airport | ABU | Atambua | ID |
| Aalborg Airport | AAL | Aalborg | DK |
| Aarhus Airport | AAR | Aarhus | DK |
| Abadan Ayatollah Jami International Airport | ABD | Abadan | IR |
| Abakan International Airport | ABA | Abakan | RU |
| Abeche Airport | AEH | Abeche | TD |
| Aberdeen International Airport | ABZ | Aberdeen | GB |
| Aberdeen Regional Airport | ABR | Aberdeen | US |
| Abha International Airport | AHB | Abha | SA |
| Abilene Regional Airport | ABI | Abilene | US |
| Abu Musa Island Airport | AEU | Abu Musa | IR |
| Abu Simbel Airport | ABS | Abu Simbel | EG |
| Adak Airport | ADK | Adak | US |
| Adampur Airport | AIP | Adampur | IN |
| Adana Şakirpaşa Airport | ADA | Seyhan | TR |
| Addis Ababa Bole International Airport | ADD | Addis Ababa | ET |
| Adelaide International Airport | ADL | Adelaide | AU |
| Aden International Airport | ADE | Aden | YE |
| Adıyaman Airport | ADF | Adıyaman | TR |
| Adnan Menderes International Airport | ADB | Gaziemir | TR |
| Aeroestación Yabotí | — | El Soberbio | AR |
| Aeroparque Jorge Newbery | AEP | Buenos Aires | AR |
| Agatti Airport | AGX | Agatti | IN |
| Agra Airport / Agra Air Force Station | AGR | Agra | IN |
| Ağrı Airport | AJI | Ağrı | TR |
| Aguascalientes International Airport | AGU | Aguascalientes | MX |
| Aguni Airport | AGJ | Aguni | JP |
| Ahe Airport | AHE | Ahe Atoll | PF |
| Air Force Colonel Alfredo Mendivil Duarte Airport | AYP | Ayacucho | PE |
| Aitutaki Airport | AIT | Aitutaki | CK |
| Ajaccio Napoléon Bonaparte airport | AJA | Ajaccio | FR |
| Aji Pangeran Tumenggung Pranoto International Airport | AAP | Samarinda | ID |
| Akhiok Airport | AKK | Akhiok | US |
| Akiak Airport | AKI | Akiak | US |
| Akita Airport | AXT | Akita | JP |
| Aksu Hongqipo Airport | AKU | Aksu (Onsu) | CN |
| Aktobe International Airport | AKX | Aktobe | KZ |
| Akulivik Airport | AKV | Akulivik | CA |
| Akure Airport | AKR | Akure | NG |
| Akureyri International Airport | AEY | Akureyri | IS |
| Al Ain International Airport | AAN | Al Ain | AE |
| Al Ghaydah International Airport | AAY | Al Ghaydah | YE |
| Al Massira Airport | AGA | Agadir (Temsia) | MA |
| Al-Jawf International Airport | AJF | Al-Jawf | SA |
| Alakanuk Airport | AUK | Alakanuk | US |
| Albany Airport | ALH | Albany | AU |
| Albany International Airport | ALB | Albany | US |
| Albuquerque International Sunport | ABQ | Albuquerque | US |
| Albury Airport | ABX | East Albury | AU |
| Alderney Airport | ACI | Saint Anne | GG |
| Aleppo International Airport | ALP | Aleppo | SY |
| Ålesund Airport | AES | Ålesund | NO |
| Alexandria International Airport | AEX | Alexandria | US |
| Alexandroupoli Democritus Airport | AXD | Alexandroupolis | GR |
| Alghero-Fertilia Airport | AHO | Alghero | IT |
| Alicante-Elche Miguel Hernández Airport | ALC | Alicante | ES |
| Alice Springs Airport | ASP | Alice Springs | AU |
| Allakaket Airport | AET | Allakaket | US |
| Alliance Municipal Airport | AIA | Alliance | US |
| Almaty International Airport | ALA | Almaty | KZ |
| Alor Island - Mali Airport | ARD | Kabola | ID |
| Alpena County Regional Airport | APN | Alpena | US |
| Alta Airport | ALF | Alta | NO |
| Altamira Interstate Airport | ATM | Altamira | BR |
| Altay Xuedu Airport | AAT | Altay | CN |
| Altoona Blair County Airport | AOO | Altoona | US |
| Alxa Left Banner Bayanhot Airport | AXF | Bayanhot | CN |
| Amakusa Airport | AXJ | Amakusa | JP |
| Amami Airport | ASJ | Amami | JP |
| Ambler Airport | ABL | Ambler | US |
| Amboseli Airport | ASV | Ol Tukai | KE |
| Amderma Airport | AMV | Amderma | RU |
| Amsterdam Airport Schiphol | AMS | Amsterdam | NL |
| Anaa Airport | AAA | Anaa | PF |
| Anaktuvuk Pass Airport | AKP | Anaktuvuk Pass | US |
| Anapa Vityazevo Airport | AAQ | Krasnyi Kurgan | RU |
| Andahuaylas Airport | ANS | Andahuaylas | PE |
| Andijan International Airport | AZN | Andijan | UZ |
| Andøya Airport, Andenes | ANX | Andenes | NO |
| Andrés Sabella Gálvez International Airport | ANF | Antofagasta | CL |
| Andros Town Airport | ASD | Andros Town | BS |
| Ängelholm-Helsingborg Airport | AGH | Ängelholm | SE |
| Aniak Airport | ANI | Aniak | US |
| Ankang Fuqiang Airport | AKA | Ankang (Hanbin) | CN |
| Annaba Rabah Bitat Airport | AAE | Annaba | DZ |
| Anqing Tianzhushan Airport / Anqing North Air Base | AQG | Anqing | CN |
| Anshan Teng'ao Airport / Anshan Air Base | AOG | Anshan | CN |
| Anshun Huangguoshu Airport | AVA | Anshun (Xixiu) | CN |
| Antalya International Airport | AYT | Antalya | TR |
| Antonio Roldán Betancur Airport | APO | Carepa | CO |
| Antwerp International Airport (Deurne) | ANR | Antwerp | BE |
| Anvik Airport | ANV | Anvik | US |
| Aomori Airport | AOJ | Aomori | JP |
| Apataki Airport | APK | Apataki | PF |
| Appleton International Airport | ATW | Appleton | US |
| Aracaju - Santa Maria Airport | AJU | Aracaju | BR |
| Araçatuba Airport | ARU | Araçatuba | BR |
| Arad International Airport | ARW | Arad | RO |
| Araguaína Airport | AUX | Araguaína | BR |
| Aral Tarim Airport | ACF | Aral | CN |
| Aranuka Airport | AAK | Buariki | KI |
| Araraquara Airport | AQA | Araraquara | BR |
| Arba Minch Airport | AMH | Arba Minch | ET |
| Arctic Village Airport | ARC | Arctic Village | US |
| Ardabil Airport | ADU | Ardabil | IR |
| Armidale Airport | ARM | Armidale | AU |
| Arthur's Town Airport | ATC | Arthur's Town | BS |
| Arusha Airport | ARK | Arusha | TZ |
| Arutua Airport | AXR | — | PF |
| Arvaikheer Airport | AVK | Arvaikheer | MN |
| Arvidsjaur Airport | AJR | Arvidsjaur | SE |
| Asaba International Airport | ABB | Asaba | NG |
| Asahikawa Airport | AKJ | Higashikagura | JP |
| Asheville Regional Airport | AVL | Asheville | US |
| Ashgabat International Airport | ASB | Ashgabat | TM |
| Asmara International Airport | ASM | Asmara | ER |
| Asosa Airport | ASO | Asosa | ET |
| Aspen-Pitkin County Airport (Sardy Field) | ASE | Aspen | US |
| Astrakhan Narimanovo Boris M. Kustodiev International Airport | ASF | Astrakhan | RU |
| Aswan International Airport | ASW | Aswan | EG |
| Asyut International Airport | ATZ | Asyut | EG |
| Athens Eleftherios Venizelos International Airport | ATH | Spata-Artemida | GR |
| Atka Airport | AKB | Atka | US |
| Atlantic City International Airport | ACY | Atlantic City | US |
| Atmautluak Airport | ATT | Atmautluak | US |
| Atqasuk Edward Burnell Sr Memorial Airport | ATK | Atqasuk | US |
| Auckland International Airport | AKL | Auckland | NZ |
| Augusta Regional At Bush Field | AGS | Augusta | US |
| Augusta State Airport | AUG | Augusta | US |
| Aur Island Airport | AUL | Aur Atoll | MH |
| Aurillac airport | AUR | Aurillac | FR |
| Aurukun Airport | AUU | Aurukun | AU |
| Austin Bergstrom International Airport | AUS | Austin | US |
| Avignon Caumont airport | AVN | Avignon | FR |
| Axum Airport | AXU | Axum | ET |
| Ayers Rock Connellan Airport | AYQ | Yulara | AU |
| Baise (Bose) Bama Airport | AEB | Baise (Tianyang) | CN |
| Batha Airport | — | Batha | SA |
| California Redwood Coast-Humboldt County Airport | ACV | Arcata/Eureka | US |
| César Manrique-Lanzarote Airport | ACE | San Bartolomé | ES |
| Chacalluta International Airport | ARI | Arica | CL |
| Clayton J. Lloyd International Airport | AXA | The Valley | AI |
| El Arish International Airport | AAC | El Arish | EG |
| El Eden Airport | AXM | Armenia | CO |
| Enua Airport | AIU | Atiu Island | CK |
| Faleolo International Airport | APW | Apia | WS |
| Félix-Houphouët-Boigny International Airport | ABJ | Abidjan | CI |
| Gan Gan Field | — | — | AR |
| General Juan N. Álvarez International Airport | ACA | Acapulco | MX |
| Guaraní International Airport | AGT | Ciudad del Este | PY |
| Gustavo Rojas Pinilla International Airport | ADZ | San Andrés | CO |
| Gwaunaru'u Airport | AKS | Auki | SB |
| Hartsfield Jackson Atlanta International Airport | ATL | Atlanta | US |
| Hasan Polatkan Airport | AOE | Eskişehir | TR |
| Hawassa International Airport | AWA | Hawassa | ET |
| Hiva Oa-Atuona Airport | AUQ | Hiva Oa Island | PF |
| Houari Boumediene Airport | ALG | Algiers | DZ |
| Kalamazoo/Battle Creek International Airport | AZO | Kalamazoo | US |
| Karpathos Airport | AOK | Karpathos Island | GR |
| Kayseri Erkilet International Airport | ASR | Kayseri | TR |
| Kebri Dahar Airport | ABK | Kebri Dahar | ET |
| King Hussein International Airport | AQJ | Aqaba | JO |
| King Salmon Airport | AKN | King Salmon | US |
| King Saud Bin Abdulaziz (Al Baha) Airport | ABT | Al-Baha | SA |
| Kodiak Airport | ADQ | Kodiak | US |
| Kotoka International Airport | ACC | Accra | GH |
| Kufra Airport | AKF | Kufra | LY |
| Lehigh Valley International Airport | ABE | Allentown/Bethlehem | US |
| Lengpui Airport | AJL | Aizawl (Lengpui) | IN |
| Maa Mahamaya Airport | AHA | Ambikapur | IN |
| Maharshi Valmiki International Airport | AYJ | Faizabad | IN |
| Málaga-Costa del Sol Airport | AGP | Málaga | ES |
| Marche Airport | AOI | Falconara Marittima (AN) | IT |
| Marka International (Amman Civil) Airport | ADJ | Amman | JO |
| Melbourne Avalon International Airport | AVV | Geelong/Melbourne | AU |
| Mesa Gateway Airport | AZA | Mesa | US |
| Nampula Airport | APL | Nampula | MZ |
| Nantucket Memorial Airport | ACK | Nantucket | US |
| Nnamdi Azikiwe International Airport | ABV | Abuja | NG |
| Northern Peninsula Airport | ABM | Bamaga | AU |
| Ouani Airport | AJN | Ouani | KM |
| Pattimura International Airport | AMQ | Ambon | ID |
| Piloto Osvaldo Marques Dias Airport | AFL | Alta Floresta | BR |
| Qaisumah–Hafar Al-Batin International Airport | AQI | Qaisumah | SA |
| Qasem Soleimani International Airport | AWZ | Ahvaz | IR |
| Queen Alia International Airport | AMM | Amman | JO |
| Queen Beatrix International Airport | AUA | Oranjestad | AW |
| Quezaltenango Airport | AAZ | Quezaltenango | GT |
| RAF Ascension Island | ASI | Cat Hill | SH |
| Rick Husband Amarillo International Airport | AMA | Amarillo | US |
| Rodríguez Ballón International Airport | AQP | Arequipa | PE |
| Romeu Zema Airport | AAX | Araxá | BR |
| Sabzevar National Airport | AFZ | Sabzevar | IR |
| Salerno South Airport | — | Khost | AF |
| Samaná El Catey International Airport | AZS | Samana | DO |
| San Luis Valley Regional Airport/Bergman Field | ALS | Alamosa | US |
| Sankt Gallen Altenrhein Airport | ACH | St. Gallen | CH |
| Santiago Perez Airport | AUC | Arauca | CO |
| Sardar Vallabh Patel International Airport | AMD | Ahmedabad | IN |
| Shahid Sadooghi Airport | AZD | Yazd | IR |
| Silvio Pettirossi International Airport | ASU | Asunción | PY |
| Sittwe Airport | AKY | Sittwe | MM |
| Sochi International Airport | AER | Sochi | RU |
| Southwest Georgia Regional Airport | ABY | Albany | US |
| Spring Point Airport | AXP | Spring Point | BS |
| Sri Guru Ram Das Ji International Airport | ATQ | Amritsar | IN |
| Stockholm-Arlanda Airport | ARN | Stockholm | SE |
| Suboficial Ay Santiago Germano Airport | AFA | San Rafael | AR |
| Sultan Abdul Halim Airport | AOR | Alor Satar | MY |
| Talagi Airport | ARH | Archangelsk | RU |
| Ted Stevens Anchorage International Airport | ANC | Anchorage | US |
| Touat-Cheikh Sidi Mohamed Belkebir Airport | AZR | Adrar | DZ |
| V. C. Bird International Airport | ANU | Osbourn | AG |
| Waco Regional Airport | ACT | Waco | US |
| Wageningen Airstrip | AGI | Wageningen | SR |
| Wainwright Airport | AIN | Wainwright | US |
| Wake Island Airfield | AWK | Wake Island | UM |
| Walla Walla Regional Airport | ALW | Walla Walla | US |
| Wangerooge Airport | AGE | Wangerooge | DE |
| Waterloo Regional Airport | ALO | Waterloo | US |
| Watertown International Airport | ART | Watertown | US |
| Watertown Regional Airport | ATY | Watertown | US |
| Wilkes-Barre/Scranton International Airport | AVP | Wilkes-Barre/Scranton | US |
| Xingyi Wanfenglin Airport | ACX | Xingyi | CN |
| Zayed International Airport | AUH | Abu Dhabi | AE |