# List of airline codes (A)

This is a list of all airline codes. The table lists the IATA airline designators, the ICAO airline designators and the airline call signs (telephony designator). Historical assignments are also included for completeness.

## Airline codes for airlines beginning with:

* All
* 0–9
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

## Codes

Airline codes :
| IATA | ICAO | Airline | Call sign | Country | Comments |
| | GBT | A-Jet Aviation Aircraft Management | GLOBETROTTER | Austria | |
| | AJR | A-Jet Aviation Company | JET MONGOLIA | Mongolia | |
| | SFM | A-Safar Air Services | AIR SAFAR | Nigeria | |
| | AJJ | A2 Jet Leasing | ATLANTIC JET | United States | |
| | XXV | AASANA | | Bolivia | |
| | BBE | Ababeel Aviation | BABEL AIR | Sudan | |
| 1B | | Abacus International | | Singapore | Computer reservation system |
| BJ | ABJ | Abaeté Linhas Aéreas | ABAETE | Brazil | defunct |
| | NKP | Abakan Air | ABAKAN AIR | Russia | 2014 |
| RL | ABG | Abakan-Avia | ROYAL FLIGHT | Russia | |
| | ABE | Aban Air | ABAN | Iran | Former IATA code: K5 |
| | MRP | Abas | ABAS | Czech Republic | |
| | AHU | ABC Air Hungary | ABC HUNGARY | Hungary | defunct |
| | FTY | ABC Bedarfsflug | FLY TYROL | Austria | |
| W9 | AAB | Abelag Aviation | ABG | Belgium | defunct |
| | BDV | Aberdair Aviation | ABERDAV | Kenya | |
| | ROH | Aberdair Aviation Ghana | | Ghana | |
| | ADJ | Abidjan Air Cargo | ABICAR | Côte d'Ivoire | defunct |
| | ABP | ABS Jets | BAIR | Czech Republic | Named changed from Aba Air |
| M3 | TUS | ABSA Cargo | Turismo | Brazil | |
| | TTN | Absolute Flight Services | TITANIUM | South Africa | |
| GB | ABX | ABX Air | ABEX | United States | August 15, 2003 Air operations of former Airborne Express |
| | IAE | AC Insat-Aero | | Russia | defunct |
| | NCL | ACA (Ancargo Air) | ANCARGO AIR | Angola | defunct |
| | ACD | Academy Airlines | ACADEMY | United States | |
| ZA | CYD | AccessAir | CYCLONE | United States | defunct |
| | | Ace Air | ACE TAXI | South Korea | defunct as of September 2015 |
| | CFM | ACEF | ACEF | Portugal | Transportes Aéreos e Cargas, code no longer allocated |
| | ARO | Acero Taxi | ACERO | Mexico | |
| VX | AES | ACES Colombia | ACES | Colombia | defunct |
| | BVR | ACM Air Charter | BAVARIAN | Germany | |
| | BJT | ACM Aviation | BAY JET | United States | |
| | CRV | Acropolis Aviation | ACROPOLIS | United Kingdom | |
| | ORS | Action Air | AVIATION SERVICE | Italy | ICAO Code no longer allocated, defunct |
| | AXQ | Action Airlines (Action Air Charter) | ACTION AIR | United States | |
| | AVR | Active Aero Charter, Inc. | ACTIVE AERO | United States | |
| | RRM | Acvila Air-Romanian Carrier | AIR ROMANIA | Romania | defunct |
| | ADC | AD Astra Executive Charter | AD ASTRA | Poland | |
| | VUE | AD Aviation | FLIGHTVUE | United Kingdom | |
| | ADE | Ada Air | ADA AIR | Albania | defunct, former IATA code: ZY |
| KI | DHI | Adam Air | ADAM SKY | Indonesia | defunct |
| Z7* | ADK | ADC Airlines | ADCO | Nigeria | defunct; former name: Aviation Development Company |
| | ADW | ADC Airways | | Lebanon | defunct |
| | DSC | Addis Air Cargo Services | ADDIS CARGO | Ethiopia | |
| | DDS | Addis Airlines | ADDIS LINE | Ethiopia | DEFUNCT |
| | ADF | Ade, Aviación Deportiva | ADE AVIACION | Spain | |
| | TEC | ADI Shuttle Group | TECHJET | United States | |
| | SWH | Adler Aviation | SHOCKWAVE | Canada | |
| JP | ADR | Adria Airways | ADRIA | Slovenia | defunct as of September 2019 |
| | DRO | Adro Servicios Aereos | ADRO SERVICIOS | Mexico | |
| | ADV | Advance Air Charters | ADVANCE | Canada | defunct |
| | AXX | Advance Air Luftfahrtgesellschaft | SKY SHUTTLE | Germany | |
| | AAX | Advance Aviation | ADVANCE AVIATION | Thailand | |
| | XTJ | Advance Aviation Services | | United States | |
| 4G* | | Advance Leasing Company | | United States | |
| AN | WSN | Advanced Air | WINGSPAN | United States | 2015 |
| | ADD | Advanced Air Co. | | Japan | ICAO Code no longer allocated |
| | ADV | Advanced Flight Training | ADVANCED | United Kingdom | |
| | RDD | Adygea Airlines | ADLINES | Russia | defunct |
| | DVN | Adventia | | Spain | |
| | EBS | AEG Aviation Services | | United States | |
| A3 | AEE | Aegean Airlines | AEGEAN | Greece | |
| | ALS | Aeralp | AERALP | France | |
| | AEF | Aerea | | Spain | |
| | DRD | Aereo Dorado | AEREO DORADO | Mexico | |
| | FUT | Aereo Futuro | AEREO FUTURO | Mexico | |
| | MMG | Aereo Ruta Maya | RUTA MAYA | Guatemala | |
| | AGI | Aereo Transportes Los Angeles de America | ANGELES AMERICA | Mexico | |
| | WWG | Aereo WWG | AERO-W | Mexico | |
| | AED | Aernord | Aernspa | Italy | defunct |
| | AKR | Aero Clinker | AERO CLINKER | Mexico | |
| | RRB | Aero Club de Castellon | | Spain | |
| 9D | CND | Aero Continente Dominicana | CONDOMINICANA | Dominican Republic | defunct |
| | ARP | Aero Corporate | IVORYCORP | Côte d'Ivoire | |
| ML | AEK | Aero Costa Rica | ACORISA | Costa Rica | defunct |
| | EPU | Aero Elite Acapulco | ELITACAPULCO | Mexico | |
| | XPN | Aero Express | | Niger | |
| | AJP | Aero Jets Corporativos | AEROJETS | Mexico | |
| VF | TKJ | AJet | ANATOLIAN | Turkey | formerly AnadoluJet |
| | OWN | Aero Owen | AERO OWEN | Mexico | 2014 |
| | GHM | Aero Service Bolivia | | Bolivia | |
| | GLM | Aero Services Mali | GLOBAL MALI | Mali | |
| | GUE | Aero Servicio Guerrero | AERO GUERRERO | Mexico | |
| | ASR | Aero Sotravia | SOTRAVIA | France | 2014 |
| | ABA | Aero-Beta | AEROBETA | Germany | |
| DW | UCR | Aero-Charter Ukraine | CHARTER UKRAINE | Ukraine | |
| | EAP | Aero-Pyrenees | AERO-PYRENEES | France | |
| | AJH | Aeroaljarafe | ALJARAFE | Spain | |
| | AOB | Aerocaribe Coro | CARIBE CORO | Venezuela | |
| | CRN | Aero Caribbean | AEROCARIBBEAN | Cuba | Merged into Cubana de Aviación in 2015 |
| | ACR | Aerocenter, Escuela de Formación de Pilotos Privados de Avión | AEROCENTER | Spain | |
| | ERC | Aerocharter | | Guatemala | defunct |
| | BSO | Aeroclub Barcelona-Sabadell | | Spain | |
| | NVA | Aeroclub de Albacete | | Spain | |
| | LUE | Aeroclub de Alicante | | Spain | |
| | MLL | Aeroclub de Mallorca | MALLORCA | Spain | |
| | AVX | Aeroclub de Vitoria | | Spain | |
| | CTD | Aerocorporativos | AEROCORPORATIVOS | Mexico | |
| | RRO | Aerocredo | | Russia | |
| | DVI | Aerodavinci | AERO DAVINCI | Mexico | |
| | FAQ | Aerofaq | | Ecuador | |
| SU | AFL | Aeroflot | AEROFLOT | Russia | |
| P3 | PLS | Aeroflot-Plus | AEROPLUS | Russia | |
| | AEG | Aerofumigaciones Sam | FUMIGACIONES SAM | Chile | defunct |
| | AGQ | Aerogala | GALASERVICE | Chile | defunct |
| | ARH | Aerohelicopteros | AEROHELCA | Venezuela | 2014 |
| | BJU | AeroJet | JET EXPRESS | Angola | |
| | ARJ | Aerojet de Costa Rica, S.A. | | Costa Rica | |
| | LFT | Aerolift Company | LIFTCO | Sierra Leone | defunct |
| | LIN | Aerolimousine | AEROLIMOUSINE | Russia | |
| | PCP | Aerolínea Principal Chile | PRINCIPAL | Chile | |
| | ALT | Aerolíneas Centrales | AERLINEAS CENTRALES | Mexico | |
| | AHL | Aerolíneas Hidalgo | HIDALGO | Mexico | |
| | APR | Aerolíneas Primordiales | AEROPERLAS | Mexico | |
| | LDL | Aerologic | | Russia | |
| | VSC | Aeronautic de Los Pirineos | | Spain | |
| | PSE | Aeroservicio Sipse | SIPSE | Mexico | |
| | PSL | Aeroservicios Corporativos De San Luis | CORSAN | Mexico | |
| | EAE | Aeroservicios Ecuatorianos | AECA | Ecuador | |
| | AES | Aerosur Paraguay | AEROPARAGUAY | Paraguay | |
| | BTS | Aerotaxis Albatros | AEROLINEAS ALBATROS | Mexico | |
| | PRI | Aerotransportes Privados | AEROPRIV | Mexico | ICAO code in use by another company, call sign no longer allocated |
| | PVA | Aerotransportes Privados | TRANSPRIVADO | Mexico | |
| | VMX | Aeroventas de Mexico | VENTA | Mexico | 2014 |
| | ABU | Aerovías Bueno | AEROBUENO | Colombia | defunct |
| | ACB | African Cargo Services | AFRICARGO | Kenya | |
| | AAP | Arabasco Air Services | ARABASCO | Saudi Arabia | |
| | AAR | Americ Air | PATRIOT | United States | defunct |
| | AAS | Airtransservice | Aviaservice | Russia | defunct |
| | AAS | Austrian Air Services | AIR SERVICES | Austria | defunct |
| OB | AAT | Austrian Airtransport | AUSTRIAN CHARTER | Austria | defunct; former IATA code: U8, OG; former ICAO code: AUC |
| | AAV | Aly Aviation | | United Kingdom | defunct; former ICAO code: AAY |
| | AAW | Austin Airways | AUSTIN | Canada | defunct |
| SM | AAW | Allied Airways | | United Kingdom | defunct, taken over by British European Airways which went on to form British Airways. |
| | AAW | Almeta Air | ALMETA AIR | Austria | defunct |
| KJ | AAZ | Asian Air | | Kyrgyzstan | |
| | ABT | Ambeo | AMBITION | United Kingdom | |
| | ABE | Arberia Airlines | ARBERIA AIRLINES | Albania | defunct |
| | ACE | Air Charter Express | | Ghana | |
| YE | ACQ | Aryan Cargo Express | | India | |
| | ACS | Aircraft Sales and Services | AIRCRAFT SALES | Pakistan | |
| | ABS | Air Central | AIR CENTRAL | United States | defunct |
| | ADT | Arrendaminetos y Transportes Turisticos | ARRENDA-TRANS | Mexico | |
| | ADZ | Avio Delta | | Bulgaria | |
| | AED | Aie Experience Flight | AIE EXPERIENCE | United Kingdom | defunct |
| VJ | AFF | Africa Airways | AFRIWAYS | Benin | defunct |
| | AFM | AEROSPEED FORMATION ET MAINTENANCE | EPIC AIR | France | |
| | LBR | Air Costa (Lepl Project Limited) | | India | defunct |
| QH | FLA | Air Florida | PALM | United States | relaunching |
| 3O | MAC | Air Arabia Maroc | ARABIA MAROC | Morocco | This ICAO designator was previously used by Malta Air Charter |
| | MRY | Air Marine | AIR MARINE | France | |
| | PNK | Air Pink | AIRPINK | Serbia | |
| | PXG | Aitheras Aviation Group | | United States | |
| | AFN | African International Airlines | SIMBA | Lesotho | |
| HD | ADO | AIRDO | AIR DO | Japan | |
| | ACC | Airspeed Charter | | Jamaica | 2014 |
| | PNX | AIS Airlines | SPINNER | Netherlands | |
| | AVD | Álamo Aviación, S.L. | ALAMO | Spain | |
| | FSY | Algonquin Airlink | FROSTY | Canada | 2014 |
| | TTX | Alliance Air Charters | TWISTER | United States | |
| UJ | LMU | AlMasria Universal Airlines | ALMASRIA | Egypt | |
| | ALN | Alpha Jet, S.R.O. | TOLEMAC | Slovakia | 2014 |
| | APN | Alpine Airlines | AIR ALPES | France | |
| | BAH | The Amiri Flight | BAHRAIN | Bahrain | |
| A2 | AWG | Animawings | ANIMA WINGS | Romania | |
| | TLB | Atlantique Air Assistance | TRIPLE-A | France | |
| | UJX | Atlas Ukraine Airlines | ATLAS UKRAINE | Ukraine | 2014 |
| | AGM | Aviation West Charters | ANGEL MED | United States | 2015 |
| X9 | NVD | Avion Express | NORDVIND | Lithuania | Name changed from Nordic Solutions Air |
| | AZB | Azamat | TUMARA | Kazakhstan | defunct |
| 3S* | AEN | Aeroland Airways | AEROLAND | Greece | defunct, ICAO code no longer allocated |
| | NGF | Air Charity Network | ANGEL FLIGHT | United States | Re-allocated in 2014 was used by Angel Flight America |
| | WFT | Aircharters Worldwide | WORLD FLIGHT | United States | Allocated 2014 |
| JU | ASL | Air Serbia | AIR SERBIA | Serbia | Name changed from Aeroput to JAT Yugoslav Airlines to Jat Airways to Air Serbia. Formerly used JAT as ICAO code. |
| QH | LYN | Air Kyrgyzstan | ALTYN AVIA | Kyrgyzstan | Name changed from Kyrgyzstan |
| XK | CCM | Air Corsica | CORSICA | France | |
| | AHS | AHS Air International | HIGH SKY | Pakistan | |
| | ROO | Aero Roa | AERO ROA | Mexico | |
| | AWF | Aeroforward | | United States | |
| | SUP | Aeronautical Charters | SUN SPEED | United States | |
| | PSO | Aerotaxis Pegaso | AEROPEGASO | Mexico | |
| EI | EIN | Aer Lingus | SHAMROCK | Ireland | |
| EG | EUK | Aer Lingus UK | GREEN FLIGHT | United Kingdom | |
| | VLB | Air Volta | VOLTA | Bulgaria | |
| | FCJ | AirSprint US | FRACJET | United States | Previously used code "HAB" |
| | TEW | Airteam Charter | TEAMWORK | South Africa | |
| | STT | Alpha Star Charter | STAR CHARTER | Saudi Arabia | |
| | LBZ | Angkasa Super Service | | Indonesia | |
| | HEZ | Arrow Aviation | ARROW | Israel | |
| | UAH | Air Experience Flight, Cranwell | | United Kingdom | Royal Air Force |
| | RVQ | Aero Jet International | REVA AIR | United States | |
| | ASK | Aerosky | MULTISKY | Spain | |
| | AEH | Aero4m | AEROCUTTER | Slovenia | |
| | ERO | Aeroecom | AEROECOM | Venezuela | |
| A8 | XAU | Aerolink Uganda | PEARL | Uganda | |
| | NKY | Aeromonkey | AEROMON | Mexico | |
| | AWP | Aeroworld Pakistan | | Pakistan | |
| | AGA | AG Air | GEOLINE | Georgia | |
| | ABZ | Air Ambulance Services | ISLAND LIFEFLIGHT | Bahamas | |
| RV | ROU | Air Canada Rouge | ROUGE | Canada | |
| | CNM | Air China Inner Mongolia | MENGYUAN | China | |
| | VRE | Air Côte d'Ivoire | COTE DIVORIE | Ivory Coast | |
| | AWL | Air Walser | | Malta | |
| | AXY | Air X Charter | LEGEND | Malta | |
| | OES | ART Aviation | ART AUSTRIA | Austria | |
| | ASF | Austrian Air Force | AUSTRIAN AIRFORCE | Austria | |
| | AVG | Aviation Legacy | AVILEF | Gambia | |
| 7A | AZY | Aztec Worldwide Airlines | AZTEC WORLD | United States | |
| 6U | ACX | Air Cargo Germany | LOADMASTER | Germany | defunct |
| | AAD | Aero Aviation Centre Ltd. | SUNRISE | Canada | Ceased operations 1995 |
| | SII | Aero Servicios Ejecutivos Internacionales | ASEISA | Mexico | |
| | BZS | Aero Biniza | BINIZA | Mexico | |
| | | Aero Comondu | AERO COMONDU | Mexico | |
| | AET | Aero-Palma | AERO PALMA | Spain | defunct |
| | ABM | Aero Albatros | ALBATROS ESPANA | Spain | |
| ZI | AAF | Aigle Azur | AIGLE AZUR | France | Former name: Lucas Aigle Azur; former IATA code: LK |
| | AAM | Aim Air | | Moldova | |
| | AAO | Atlantis Airlines (USA) | ATLANTIS AIR | United States | |
| | AAP | Aerovista Airlines | AEROVISTA GROUP | Kyrgyzstan | defunct |
| AE | AE | Air Ceylon | CEYLON | Sri Lanka | defunct |
| 4K* | AAS | Askari Aviation | AL-ASS | Pakistan | |
| | AAU | Australia Asia Airlines | AUSTASIA | Australia | Subsidiary merged into Qantas; former IATA code: IM |
| | AAV | Astro Air International | ASTRO-PHIL | United States | |
| 8U | AAW | Afriqiyah Airways | AFRIQIYAH | Libya | |
| Q9 | AFU | Afrinat International Airlines | AFRINAT | Gambia | defunct, ICAO code no longer allocated |
| | AAX | Afric'air Express | AFREX | Côte d'Ivoire | defunct |
| | BRL | Air Brasd'or | BRASD'OR | Canada | |
| | AFH | Air Fecteau | FECTO | Canada | defunct |
| | BRM | Air 500 | BOOMERANG | Canada | defunct |
| | AAG | Atlantic Flight Training | ATLANTIC | United Kingdom | Changed from Air Atlantique in 2014 |
| KI | AAG | Air Atlantique | ATLANTIC | United Kingdom | Former name: Atlantic Air Transport; former IATA codes: 7M, DG, transferred to Atlantic Flight Training in 2014. |
| QB | AAJ | Air Alma | AIR ALMA | Canada | Ceased operations 10/01/2002; former IATA code: 4L |
| | ACS | Air Cess | | Liberia | defunct |
| | ADT | Air Dorval | AIR DORVAL | Canada | defunct |
| | AHN | Air Hungaria | AIR HUNGARIA | Hungary | |
| | AHR | Air Adriatic | ADRIATIC | Croatia | defunct |
| LD | AHK | Air Hong Kong | AIR HONG KONG | Hong Kong | |
| | AHS | Air Viggi San Raffaele | AIRSAR | Italy | |
| | AAI | Air Aurora | BOREALIS | United States | Former IATA code: AX |
| | ACU | Air Cargo Transportation System | AFRISPIRIT | Kenya | |
| | ACV | Air Charter Service | | United Kingdom | ICAO code no longer allocated |
| | ADC | Air Atlantic Dominicana | ATLAN-DOMINICAN | Dominican Republic | defunct |
| 2Y | ADW | Air Andaman | AIR ANDAMAN | Thailand | defunct 2004 |
| UX | AEA | Air Europa | EUROPA | Spain | |
| | AEQ | Air Express | LUNA | Sweden | |
| IG | AEY | Air Italy | AIR ITALY | Italy | merged into Meridiana |
| | ASW | Air Southwest Ltd. | AIRSOUTHWEST | Canada | defunct |
| | ASX | Air Special | AIRSPEC | Czech Republic | |
| NX | AMU | Air Macau | AIR MACAO | Macao | |
| 6A | AMW | Armenia Airways | ARMENIA | Armenia | |
| HM | SEY | Air Seychelles | SEYCHELLES | Seychelles | |
| | SFB | Air Sofia | AIR SOFIA | Bulgaria | defunct |
| | BRF | Air Bravo | AIR BRAVO | Uganda | |
| AF | AFR | Air France | AIRFRANS | France | |
| | ACG | Air Partner | AIR PARTNER | United Kingdom | |
| SB | ACI | Air Caledonie International | AIRCALIN | France | |
| | VSG | AirClass Airways | VISIG | Spain | formerly Visig Operaciones Aéreas |
| EH | AKX | Air Nippon Network Co. Ltd. | ALFA WING | Japan | merged into ANA Wings |
| | ALM | Air ALM | ANTILLEAN | Netherlands Antilles | defunct |
| | ALN | Air Lincoln | CHICAGO LINCOLN | United States | |
| | ACM | Air Caledonia | WEST CAL | Canada | |
| ED | AXE | AirExplore | GALILEO | Slovakia | |
| | AGM | Air Guam | AIR GUAM | United States | |
| ZW | AWI | Air Wisconsin | WISCONSIN | United States | |
| | ALU | Air Luxor STP | LUXORJET | São Tomé and Príncipe | |
| YI | RSI | Air Sunshine | AIR SUNSHINE | United States | |
| GN | AGN | Air Gabon | GOLF NOVEMBER | Gabon | defunct |
| 9T | RUN | Air ACT | CARGO TURK | Turkey | |
| | AFV | Air Afrique Vacancies | AFRIQUE VACANCE | Côte d'Ivoire | |
| ZB | ABN | Air Albania | AIR ALBANIA | Albania | |
| 3J | AAQ | Air Alliance | LIAISON | Canada | defunct |
| WP | ATW | Air Antwerp | DEVIL | Belgium | defunct |
| BX | ABL | Air Busan | AIR BUSAN | South Korea | |
| | ACH | Air Cargo Plus | AIR PLUS | Liberia | |
| | AAT | Air Central Asia | | Kyrgyzstan | |
| LB | LEP | Air Costa | LECOSTA | India | |
| | AFS | Air Data | | United Kingdom | |
| GL | GRL | Air Greenland | GREENLAND | Greenland | |
| 3S | GUY | Air Guyane Express | GREEN BIRD | French Guiana | |
| | AHO | Air Hamburg | AIR HAMBURG | Germany | |
| NQ | AJX | Air Japan | AIR JAPAN | Japan | |
| IJ | LIB | Air Liberté | LIBERTE | France | defunct |
| TT | KLA | Air Lithuania | KAUNAS | Lithuania | defunct |
| QM | AIM | Air Malawi | MALAWI | Malawi | defunct |
| L6 | AMI | Air Maldives | AIR MALDIVES | Maldives | defunct |
| ML | BIE | Air Mediterranee | MEDITERRANEE | France | defunct |
| P8 | MKG | Air Mekong | MEKONG | Vietnam | defunct |
| | AMG | Air Minas Linhas Aéreas | AIR MINAS | Brazil | defunct |
| 4O | MNE | Air Montenegro | MOUNT EAGLE | Montenegro | |
| | TAH | Air Moorea | AIR MOOREA | France | defunct |
| | ANV | Air Nevada | AIR NEVADA | United States | |
| NZ | ANZ | Air New Zealand | NEW ZEALAND | New Zealand | "NZ" used by New Zealand National Airways Corporation until its merger with Air New Zealand in 1978 "TE" used by TEAL from 1940-1965, then Air New Zealand from 1965-1990 |
| 4N | ANT | Air North Charter - Canada | AIR NORTH | Canada | |
| | AOE | Air One Executive | | Italy | |
| | AEI | Air Poland | POLISH BIRD | Poland | defunct |
| YP | APZ | Air Premia | AIR PREMIA | South Korea | |
| | AVZ | Air Valencia | AIR VALENCIA | Spain | |
| | AMO | Air Montreal (Air Holdings Inc.) | AIR MONTREAL | Canada | |
| BM | | Air Sicilia | | Italy | defunct |
| | AMR | Air Specialties Corporation | AIR AM | United States | Air American, Total Air |
| | AMS | Air Muskoka | AIR MUSKOKA | Canada | |
| | AOJ | Avcon Jet | ASTERIX | Austria | |
| | AJU | Air Jetsul | AIRJETSUL | Portugal | |
| | AKA | Air Korea Co. Ltd. | | Republic of Korea | |
| | LIV | Air Livonia | LIVONIA | Estonia | defunct |
| ZX | ABL | Air BC | AIRCOACH | Canada | Merged into Air Canada Jazz |
| | ABN | Air Fret Senegal | | Senegal | |
| | LJA | Air Jamahiriya Company | AIR JAMAHIRIYA | Libya | ICAO code no longer allocated |
| G8 | AGB | Air Service Gabon | | Gabon | defunct |
| 7T | AGV | Air Glaciers | AIR GLACIERS | Switzerland | |
| | MVM | Air Cargo America | PEGASUS | United States | |
| | AMY | Air Ambar | AIR AMBAR | Dominican Republic | |
| 6V | VGA | Air Vegas | AIR VEGAS | United States | defunct |
| | AOU | Air Tractor | AIR TRACTOR | Croatia | |
| | APA | Air Park Aviation Ltd. | CAN-AM | Canada | |
| | APG | Air People International | AIR PEOPLE | Thailand | |
| NH | ANA | All Nippon Airways | ALL NIPPON | Japan | |
| | ANB | Air Navigation And Trading Co. Ltd. | AIR NAV | United Kingdom | Former ICAO code: AAT |
| | NGO | Air-Angol | AIR ANGOL | Angola | |
| TZ | TWG | air-taxi Europe | TWINGOOSE | Germany | |
| | NGP | Air Nigeria | REGAL EAGLE | Nigeria | defunct |
| 2Q | SNC | Air Cargo Carriers | NIGHT CARGO | United States | |
| | SND | Air Samarkand | ARSAM | Uzbekistan | |
| V7 | SNG | Air Senegal International | AIR SENEGAL | Senegal | defunct |
| | SNY | Air Sandy | AIR SANDY | Canada | |
| | AII | Air Integra | INTEGRA | Canada | |
| | BFF | Air Baffin | AIR BAFFIN | Canada | renamed to Air Nunavut |
| | BDM | Air Bandama | BANDAMA | Ivory Coast | |
| AB | BER | Air Berlin | AIR BERLIN | Germany | defunct |
| | ABT | Air Brousse | AIR BROUSSE | Canada | defunct |
| | APV | Air Plan International | AIR PLAN | Democratic Republic of the Congo | |
| | ARX | Air Xpress, Inc. | AIREX | United States | |
| | HTT | Air Tchad | HOTEL TANGO | Chad | |
| | ARZ | Air Resorts | AIR RESORTS | United States | |
| | ASB | Air-Spray 1967 Ltd. | AIR SPRAY | Canada | |
| | ASC | Air Star Corporation | AIR STAR | Canada | |
| 4D | ASD | Air Sinai | AIR SINAI | Egypt | |
| | AQN | Air Queensland | BUSHAIR | Australia | defunct |
| | ARC | Air Routing International Corp. | | United States | |
| QN | ARR | Air Armenia | AIR ARMENIA | Armenia | |
| | AIL | Air Illinois | AIR ILLINOIS | United States | defunct |
| AI | AIC | Air India Limited | AIRINDIA | India | |
| | AIG | Air Inter Gabon | | Gabon | |
| PJ | SPM | Air Saint Pierre | SAINT-PIERRE | France | |
| SZ | WOW | Air Southwest | SWALLOW | United Kingdom | defunct |
| | ATJ | Air Traffic GmbH | SNOOPY | Germany | |
| 8C | ATN | Air Transport International | AIR TRANSPORT | United States | |
| | ATQ | Air Transport Schiphol | MULTI | Netherlands | |
| | ATS | Air Transport Service | | Democratic Republic of the Congo | |
| | AVG | Air Falcon | DJIBOUTI FALCON | Djibouti | |
| | AUX | Air Uganda International Ltd. | | Uganda | |
| NF | AVN | Air Vanuatu | AIR VAN | Vanuatu | |
| ZB | BUB | Air Bourbon | BOURBON | Reunion | defunct |
| CC | ABD | Air Atlanta Icelandic | ATLANTA | Iceland | |
| | AIE | Air Inuit | AIR INUIT | Canada | |
| | AIS | Air Sureste | SURESTE | Spain | |
| RB | SBK | Air Srpska | Air Srpska | Bosnia and Herzegovina | defunct |
| TN | THT | Air Tahiti Nui | TAHITI AIRLINES | France | |
| SW | NMB | Air Namibia | NAMIBIA | Namibia | defunct |
| | NSK | Air Intersalonika | INTERSALONIKA | Greece | |
| | NTL | Air Anatolia | AIR ANATOLIA | Turkey | defunct |
| | SGA | Air Saigon | AIR SAIGON | Vietnam | |
| | AFW | Afrique Regional Airways | AFRAIR | Côte d'Ivoire | defunct |
| AW | AFW | Africa World Airlines | BLACKSTAR | Ghana | |
| | ACX | Air Charters | PARAIR | Canada | defunct |
| PE | AEL | Air Europe Italy | AIR EUROPE | Italy | defunct |
| JM | AJM | Air Jamaica | JAMAICA | Jamaica | merged into Caribbean Airlines; ICAO and IATA codes no longer used. |
| | AWN | Air Niamey | AIR NIAMEY | Niger | |
| | AWT | Air West | AIR WEST | Canada | |
| 6G | AWW | Air Wales | RED DRAGON | United Kingdom | defunct, ICAO code no longer allocated |
| TX | FWI | Air Caraïbes | FRENCH WEST | France | |
| IX | AXB | Air India Express | EXPRESS INDIA | India | |
| | AXD | Air Express | AIR SUDEX | Sudan | |
| | BSB | Air Wings | ARBAS | Moldova | |
| BT | BTI | Air Baltic | AIRBALTIC | Latvia | |
| | ANI | Air Atlantic (Nig) Limited | NIGALANTIC | Nigeria | |
| EL | ANK | Air Nippon | ANK AIR | Japan | merged into All Nippon Airways, ICAO code no longer allocated |
| YW | ANE | Air Nostrum | AIR NOSTRUM | Spain | |
| PX | ANG | Air Niugini | NIUGINI | Papua New Guinea | |
| G9 | ABY | Air Arabia | ARABIA | United Arab Emirates | |
| AC | ACA | Air Canada | AIR CANADA | Canada | |
| AP | LAV | AlbaStar | ALBASTAR | Spain | |
| E9 | MHS | Air Memphis | AIR MEMPHIS | Egypt | defunct |
| XT | AXL | Air Exel | EXEL COMMUTER | Netherlands | defunct |
| | AZF | Air Zermatt AG | AIR ZERMATT | Switzerland | |
| UM | AZW | Air Zimbabwe | AIR ZIMBABWE | Zimbabwe | |
| | MHU | Air Memphis | MEPHIS UGANDA | Uganda | |
| | MKH | Air Marrakech Service | AIR MARRAKECH | Morocco | |
| | AZX | Air Max Africa | AZIMA | Gabon | defunct |
| S2 | RSH | Air Sahara | SAHARA | India | renamed to Jetlite |
| | ATA | Air Transport Association | | United States | |
| TC | ATC | Air Tanzania | TANZANIA | Tanzania | |
| | XAC | Air Charter World | | United States | |
| 2J | VBW | Air Burkina | BURKINA | Burkina Faso | |
| | ATH | Air Travel Corp. | AIR TRAVEL | United States | |
| KM | AMC | Air Malta | AIR MALTA | Malta | |
| YT | TGA | Air Togo | AIR TOGO | Togo | defunct |
| | ASJ | Air Satellite | SATELLITE | Canada | defunct |
| | ASN | Air and Sea Transport | | Russia | |
| | ASS | Air Class, S.A. de C.V. | AIR CLASS | Mexico | |
| | NPL | Air Nepal International | AIR NEPAL | Nepal | defunct |
| | NPR | Air Napier | | New Zealand | defunct |
| | WAM | Air Taxi & Cargo | TAXI CARGO | Sudan | |
| | RSM | Air Somalia | AIR SOMALIA | Somali Republic | |
| | AWZ | AirWest | | Sudan | |
| G4 | AAY | Allegiant Air | ALLEGIANT | United States | |
| | AAZ | Angus Aviation | ANGUS | Canada | defunct |
| | ABA | Artem-Avia | ARTEM-AVIA | Ukraine | defunct |
| | ABB | African Business and Transportations | AFRICAN BUSINESS | Democratic Republic of the Congo | |
| | ABF | Aerial Oy | SKYWINGS | Finland | |
| | ABK | Alberta Citylink | ALBERTA CITYLINK | Canada | defunct, ICAO code no longer allocated |
| | ABO | APSA Colombia | AEROEXPRESO | Colombia | aka Aeroexpreso Bogota |
| O4 | ABV | Antrak Air | ANTRAK | Ghana | |
| GB | ABX | Airborne Express | ABEX | United States | August 14, 2003 merged into DHL |
| | ABZ | ATA Brasil | ATA-BRAZIL | Brazil | defunct |
| | ACC | Avcard Services | | United Kingdom | ICAO code no longer allocated |
| | ACY | Atlas Cargo Airlines | ATLAS CARGOLINES | Morocco | |
| | ADA | Airservices Australia | AUSCAL | Australia | Flight Inspection Unit |
| 8T | TID | Air Tindi | TINDI | Canada | |
| | ADB | Antonov Airlines | ANTONOV BUREAU | Ukraine | Antonov Design Bureau |
| | ADG | Aerea Flying Training Organization | AEREA TRAINING | Spain | |
| | ADI | Audeli Air | AUDELI | Spain | |
| | ADL | Aero Dynamics | COTSWOLD | United Kingdom | |
| | ADN | Aero-Dienst | AERODIENST | Germany | |
| | ADP | Aerodiplomatic | AERODIPLOMATIC | Mexico | |
| 3L | ADY | Air Arabia Abu Dhabi | Nawras | United Arab Emirates | |
| | ADQ | Avion Taxi | AIR DATA | Canada | 2695731 Canada Inc. |
| | ADS | Aviones de Sonora | SONORAV | Mexico | |
| | ADU | Airdeal Oy | AIRDEAL | Finland | |
| EM* | AEB | Aero Benin | AEROBEN | Benin | defunct |
| | AEC | Aerocésar | AEROCESAR | Colombia | defunct; aka Aerovías del César |
| | AED | Aerotrans Airlines | | Russia | defunct |
| | ADX | Anderson Aviation | ANDAX | United States | |
| | AEI | Aeroexpreso Interamericano | INTERAM | Colombia | defunct |
| | AEJ | Air Express | KHAKI EXPRESS | Tanzania | |
| | AEK | Aerocon | AEROCON | Bolivia | |
| | AEM | Aero Madrid | AEROMADRID | Spain | |
| KD | AEN | Air Enterprise | AIR ENTERPRISE | France | defunct |
| | AEO | Aeroservicios Ejecutivos Del Occidente | AERO OCCIDENTE | Mexico | |
| | AEP | Aerotec Escuela de Pilotos | AEROTEC | Spain | |
| AX | AAC | AmericanConnection | CONNECT AMERICA | United States | defunct |
| AN | AAA | Ansett Australia | ANSETT | Australia | defunct |
| | AAC | Army Air Corps | ARMYAIR | United Kingdom | |
| 5W | AEU | Astraeus | FLYSTAR | United Kingdom | defunct, ICAO code no longer allocated |
| | AEV | Aeroventas | AEROVENTAS | Mexico | |
| VV | AEW | Aerosvit Airlines | AEROSVIT | Ukraine | defunct |
| | AEX | Airway Express | AVCO | United States | ICAO code no longer allocated |
| | AEZ | Aerial Transit | AERIAL TRANZ | United States | |
| | AFA | Alfa Air | BLUE ALFA | Czech Republic | |
| WK | AFB | American Falcon | AMERICAN FALCON | Argentina | defunct |
| QQ | UTY | Alliance Airlines | UNITY | Australia | |
| | UVS | Air Universal | UNI-LEONE | Sierra Leone | defunct |
| | UVT | Auvia Air | AUVIA | Indonesia | |
| | AFC | African West Air | AFRICAN WEST | Senegal | |
| | AFE | Airfast Indonesia | AIRFAST | Indonesia | |
| FG | AFG | Ariana Afghan Airlines | ARIANA | Afghanistan | |
| RV* | AFI | Africaone | AFRICAWORLD | The Gambia | |
| Y2 | AFJ | Alliance Air | JAMBO | Uganda | Ceased operations 08/10/2000 |
| | AFK | Africa Air Links | AFRICA LINKS | Sierra Leone | |
| | AFO | Aero Empresa Mexicana | AERO EMPRESA | Mexico | |
| | AFQ | Alba Servizi Aerotrasporti | ALBA | Italy | |
| 5Z | AFX | Airfreight Express | | United Kingdom | Ceased operations 08/03/2002 |
| | AFY | Africa Chartered Services | AFRICA CHARTERED | Nigeria | |
| | AFZ | Africa Freight Services | AFREIGHT | Zambia | |
| | AGA | Aeronaves Del Centro | | Venezuela | |
| | AGC | Arab Agricultural Aviation Company | AGRICO | Egypt | |
| | AGF | Atlantic Gulf Airlines | ATLANTIC GULF | United States | defunct |
| 5D | SLI | Aeroméxico Connect | COSTERA | Mexico | |
| | AGG | Algoma Airways | ALGOMA | Canada | ICAO code no longer allocated |
| | AGH | Altagna | ALTAGNA | France | |
| | AGO | Angola Air Charter | ANGOLA CHARTER | Angola | |
| | AGP | AERFI Group | AIR TARA | Ireland | |
| 1A | AGT | Amadeus IT Group | AMADEUS | Spain | |
| | AGU | Angara Airlines | SARMA | Russia | |
| | AGW | Aero Gambia | AERO GAMBIA | Gambia | defunct, ICAO code no longer allocated |
| JJ | AGX | Aviogenex | GENEX | Serbia | defunct |
| | BLR | Atlantic Coast Airlines | BLUE RIDGE | United States | defunct |
| | BLZ | Aero Barloz | AEROLOZ | Mexico | |
| PL | PLI | Aeroperú | Aeroperu | Peru | defunct |
| 8A | BMM | Atlas Blue | ATLAS BLUE | Morocco | defunct |
| | BNB | Aero Banobras | AEROBANOBRAS | Mexico | |
| | AGY | Aero Flight Service | FLIGHT GROUP | United States | |
| | AGZ | Agrolet-Mci | AGROLET | Slovakia | |
| GD | AHA | Air Alpha Greenland | AIR ALPHA | Denmark | sold to Air Greenland |
| | AHC | Azal Avia Cargo | AZALAVIACARGO | Azerbaijan | Cargo Airline of the State Concern Azerbaijan Hava |
| | AHE | Airport Helicopter Basel, Muller & Co. | AIRPORT HELICOPTER | Switzerland | |
| | CJE | Aeroservices Corporate | BIRD JET | France | |
| | AHF | Aspen Helicopters | ASPEN | United States | |
| | AHG | Aerochago Airlines | AEROCHAGO | Dominican Republic | defunct |
| | AHH | Airplanes Holdings | AIRHOLD | Ireland | |
| | AHP | Aerochiapas | AEROCHIAPAS | Mexico | |
| HT | AHW | Aeromist-Kharkiv | AEROMIST | Ukraine | defunct |
| J2 | AHY | Azerbaijan Airlines | AZAL | Azerbaijan | |
| U3 | AIA | Avies | AVIES | Estonia | |
| 4Y | AIB | Airbus Industrie | AIRBUS INDUSTRIE | France | |
| KJ | AIH | Air Incheon | AIR INCHEON | South Korea | |
| RS | ASV | Air Seoul | AIR SEOUL | South Korea | |
| | AIK | African Airlines International Limited | AFRICAN AIRLINES | Kenya | |
| | AIN | African International Airways | FLY CARGO | Swaziland | |
| 5A | AIP | Alpine Air Express | ALPINE AIR | United States | |
| | AIU | Alicante Internacional Airlines | ALIA | Spain | |
| PA | ABQ | Airblue | AIRBLUE | Pakistan | |
| | THM | Airmark Aviation | THAI AIRMARK | Thailand | |
| | AIR | Airlift International | AIRLIFT | United States | defunct |
| | AIT | Airest | AIREST CARGO | Estonia | |
| | AIV | Airvias S/A Linhas Aéreas | AIRVIAS | Brazil | |
| W4 | BES | Aero Services Executive | BIRD EXPRESS | France | |
| | AIW | Atlantic Island Airways | TARTAN | Canada | |
| | AIX | Aircruising Australia | CRUISER | Australia | |
| | AIY | Aircrew Check and Training Australia | AIRCREW | Australia | |
| IZ | AIZ | Arkia Israel Airlines | ARKIA | Israel | |
| | AJA | Afghan Jet International Airlines | AFGHAN JET | Afghanistan | |
| | AJB | Aero JBR | AERO JBR | Mexico | |
| | AJE | Aero Jet Express | JET EXPRESS | Mexico | defunct |
| | AJI | Ameristar Jet Charter | AMERISTAR | United States | |
| | AJK | Allied Air | BAMBI | Nigeria | |
| | AJO | Aero Ejecutivo | AEROEXO | Mexico | defunct |
| | AJS | Aeroejecutivos Colombia | AEROEJECUTIVOS | Colombia | Aeroejecutivos Aeroservicios Ejecutivos |
| M6 | AJT | Amerijet International | AMERIJET | United States | |
| | AJV | ANA & JP Express | AYJAY CARGO | Japan | merged into Air Japan |
| | AJW | Alpha Jet International | ALPHAJET | United States | |
| | AJY | AJet | AYJET | Cyprus | defunct, ICAO code no longer allocated |
| | AKB | Aktjubavia | KARAB | Kazakhstan | |
| | AKC | Arca Aerovías Colombianas Ltda. | ARCA | Colombia | |
| | AKF | Anikay Air Company | ANIKAY | Kyrgyzstan | |
| | AKH | Akhal | AKHAL | Turkmenistan | |
| | MNI | Aeromilenio | AEROMIL | Mexico | |
| | AKK | Aklak Air | AKLAK | Canada | |
| 4A | AKL | Air Kiribati | KIRIBATI | Kiribati | |
| | AKN | Alkan Air | ALKAN AIR | Canada | |
| | AKW | Angkor Airways | ANGKORWAYS | Cambodia | defunct |
| | AKZ | AK Navigator LLC | ABSOLUTE | Kazakhstan | ICAO code no longer allocated |
| | ALB | Aero Albatros | ALBATROS | Mexico | |
| | ALD | Albion Aviation | ALBION | United Kingdom | |
| | ALE | Aeroalas Colombia | AEROALAS | Colombia | defunct |
| | ALF | Allied Command Europe (Mobile Force) | ACEFORCE | Belgium | |
| | FYS | American Flyers | AMERICAN FLYERS | United States | |
| | DFA | Aero Coach Aviation | AERO COACH | United States | |
| EV | ASQ | Atlantic Southeast Airlines | ACEY | United States | Merged into ExpressJet Airlines |
| | ALG | Air Logistics | AIRLOG | United States | |
| | ALL | Aerovallarta | VALLARTA | Mexico | |
| HP | AWE | America West Airlines | CACTUS | United States | Merged with US Airways |
| 6R | TNO | Aerotransporte de Carga Union | AEROUNION | Mexico | |
| | TND | Aero Taxis Cessna | TAXIS CESSNA | Mexico | |
| | TMP | Arizona Express Airlines | TEMPE | United States | |
| | ALO | Allegheny Commuter Airlines | ALLEGHENY | United States | US Airways Express |
| | ALP | Allpoints Jet | ALLPOINTS | China | |
| | ALP | Alpliner AG | ALPINER | Switzerland | Code now allocated to another user |
| | ALQ | Altair Aviation (1986) | ALTAIR | Canada | |
| VH | ALV | Aeropostal Alas de Venezuela | AEROPOSTAL | Venezuela | |
| | ALW | Alas Nacionales, S.A. | ALNACIONAL | Dominican Republic | |
| | ALY | Alyeska Air Service | ALYESKA | United States | |
| | ALZ | Alta Flights (Charters) Ltd. | | Canada | |
| | AMA | ATMA | ADIK | Kazakhstan | |
| | AMD | Aerolíneas Medellín | AEROLINEAS MEDELLIN | Colombia | defunct |
| | AMF | Ameriflight | AMFLIGHT | United States | |
| | AMH | Alan Mann Helicopters Ltd. | MANN | United Kingdom | ICAO code no longer allocated |
| | AMJ | Aviation Amos | AVIATION AMOS | Canada | |
| | AMK | Amerer Air | AMER AIR | Austria | |
| | AMM | Aeroputul International Marculesti | AEROM | Moldova | |
| DP | AMM | Air 2000 | JETSET | United Kingdom | defunct |
| | AMP | Aero Transporte S.A. (ATSA) | ATSA | Peru | |
| | AMQ | Aeromedicare Ltd. | LIFELINE | United Kingdom | No longer current |
| | AMQ | Aircraft Management and Consulting | AMEX | Poland | |
| TZ | AMT | ATA Airlines | AMTRAN | United States | defunct |
| YJ | AMV | AMC Airlines | AMC AIRLINES | Egypt | Aircraft Maintenance Company |
| AM | AMX | Aeroméxico | AEROMEXICO | Mexico | |
| | AMZ | Amiya Airline | AMIYA AIR | Nigeria | |
| | ANC | Anglo Cargo | ANGLO | United Kingdom | Defunct, ICAO code no longer allocated |
| | BRP | AeroBratsk | AEROBRA | Russia | |
| | ANH | Alajnihah for Air Transport | ALAJNIHAH | Libya | |
| | ANM | Aerotransportacion de Norteamerica | NORAM | Mexico | |
| | ANM | Antares Airtransport, Maintenance & Service GmbH | ANTARES | Germany | ICAO Code now allocated to another user |
| TL | ANO | Airnorth | TOPEND | Australia | |
| | ANQ | Aerolínea de Antioquia | ANTIOQUIA | Colombia | |
| OY | ANS | Andes Líneas Aéreas | AEROANDES | Argentina | |
| IW | AOM | AOM French Airlines | French Lines | France | defunct |
| | ANW | Aviación Del Noroeste, S.A. de C.V. | AVINOR | Mexico | defunct |
| | SAP | Avia Jaynar | TOBOL | Kazakhstan | |
| | EMS | Aero Servicios Empresariales | SERVIEMPRESARIAL | Mexico | |
| | AOA | Alcon Servicios Aéreos, S.A. de C.V. | ALCON | Mexico | |
| J6 | AOC | AVCOM | AERO AVCOM | Russia | |
| | AOD | Aero Vodochody | AERO CZECH | Czech Republic | |
| | AOF | Atair Pty Ltd. | ATAIR | South Africa | |
| 2D | AOG | Aero VIP | AVIP | Argentina | defunct |
| | MUN | Aeromundo Ejecutivo | AEROMUNDO | Mexico | |
| | MUR | Aerolínea Muri | MURI | Mexico | |
| | AOI | Astoria, Inc. | ASTORIA | Canada | defunct |
| | NRO | Aero Rent JSC | AEROMASTER | Russia | defunct |
| | NRP | Aeronord-Grup | AERONORD | Moldova | |
| | AOK | Aeroatlantico Colombia | | Colombia | defunct |
| | AOL | Angkor Airlines | ANGKOR AIR | Cambodia | defunct |
| | AON | Aero Entreprise | AERO ENTERPRISE | France | |
| | AOO | As, Opened Joint Stock Company | COMPANY AS | Ukraine | |
| | AOP | Aeropiloto | AEROPILOTO | Portugal | |
| VB | VIV | Aeroenlaces Nacionales | AEROENLACES | Mexico | Former ICAO code: AEN |
| | VIZ | Aerovis Airlines | AEROVIZ | Ukraine | |
| | VJE | AvJet Routing | | United Arab Emirates | |
| | VGF | Aerovista Gulf Express | VISTA GULF | United Arab Emirates | |
| | VER | Almaver | ALMAVER | Mexico | |
| | AOR | Afro International Ent. Limited | INTER-AFRO | Nigeria | |
| | SMX | Alitalia Express | ALIEXPRESS | Italy | |
| OE | AOT | Asia Overnight Express | ASIA OVERNIGHT | Philippines | |
| | AOV | Aero Vision | AEROVISION | France | |
| | AOX | Aerotaxi Del Valle | AEROVALLE | Colombia | |
| | APC | Airpac Airlines, Inc. | AIRPAC | United States | |
| | SVM | Aeroservicios Monterrey | SERVIMONTE | Mexico | |
| | APF | Amapola Flyg AB | AMAPOLA | Sweden | |
| | APH | Alpha Aviation, Inc. | AIRFLIGHT | United States | |
| | API | ASA Pesada, Lda. | ASA PESADA | Angola | |
| | APJ | Peach Aviation | AIR PEACH | Japan | |
| | PET | Aerotransporte Petrolero | AEROPETRO | Colombia | |
| GV | ARF | Aero Flight | Aero Fox | Germany | defunct |
| | BKL | Aircompany Barcol | BARCOL | Russia | |
| | BLA | All Charter Limited | ALL CHARTER | United Kingdom | ICAO code no longer allocated |
| | APL | Appalachian Flying Service, Inc. | APPALACHIAN | United States | |
| | APM | Airpac, Inc. | ALASKA PACIFIC | United States | |
| | APO | Aeropro | AEROPRO | Canada | defunct |
| | APP | AlpAvia d.o.o. | ALPAVIA | Slovenia | |
| | APQ | Aspen Aviation | ASPEN BASE | United States | |
| | APU | Aeropuma, S.A. | AEROPUMA | El Salvador | |
| JW | APW | Arrow Air | BIG A | United States | defunct |
| | APX | Apex Air Cargo | PARCEL EXPRESS | United States | |
| | APY | APA Internacional | APA INTERNACIONAL | Dominican Republic | |
| | AQA | Aeroatlas, S.A. | ATCO | Colombia | |
| | AQL | Aquila Air Ltd. | AQUILA | Canada | |
| | AQO | Aluminum Company Of America | ALCOA SHUTTLE | United States | Alcoa Aircraft Operations |
| | AQT | Avioquintana | AVIOQUINTANA | Mexico | |
| | AQU | AirQuarius Aviation | QUARIUS | South Africa | defunct |
| | AQZ | Aerodyne Charter Company | QUANZA | United States | |
| | ARA | Arik Air | ARIK AIR | Nigeria | |
| | ARB | Avia Air N.V. | AVIAIR | Aruba | |
| 2B | AWT | Albawings | ALBAWINGS | Albania | |
| 4C | ARE | Aires, Aerovías de Integración Regional, S.A. | AIRES | Colombia | renamed to LAN Colombia |
| AR | ARG | Aerolíneas Argentinas | ARGENTINA | Argentina | |
| | ARH | Arrowhead Airways | ARROWHEAD | United States | |
| | ARI | Aero Vics | AEROVICS | Mexico | |
| | SUN | Antillana De Navegación Aérea | | Dominican Republic | |
| | SUO | Aeroservicios De San Luis | SERVICIO SANLUIS | Mexico | |
| | SUP | Aerosuper | AEROSUPER | Mexico | |
| | ARK | Aero Link Air Services S.L. | LINK SERVICE | Spain | |
| | ARL | Airlec - Air Aquitaine Transport | AIRLEC | France | |
| | ARM | Aeromarket Express | AMEX | Spain | defunct |
| | ARO | Arrow Aviation Ltd. | ARROW | Canada | defunct |
| | KLD | Air Klaipėda | AIR KLAIPEDA | Lithuania | |
| | ARQ | Armstrong Air, Inc. | ARMSTRONG | Canada | |
| | ARS | Aeromet Servicios | METSERVICE | Chile | |
| | ART | Aerotal Aerolíneas Territoriales de Colombia Ltda. | AEROTAL | Colombia | defunct |
| | ARV | Aravco Ltd. | ARAVCO | United Kingdom | |
| | ARW | Aria | ARIABIRD | France | |
| | OST | Airline Alania | ALANIA | Russia | |
| | HUC | Aerolíneas de Techuacán | LINEAS TEHUACAN | Mexico | |
| | HUT | Aerotransportes Huitzilin | AEROHUITZILIN | Mexico | |
| | HUY | Aero Transportes Del Humaya | AERO HUMAYA | Mexico | |
| | ARY | Argosy Airways | GOSEY | United States | |
| AS | ASA | Alaska Airlines, Inc. | ALASKA | United States | |
| PL | ASE | Airstars | MOROZOV | Russia | defunct |
| | ASF | Air Schefferville, Inc. | SCHEFF | Canada | |
| | ASG | African Star Airways (PTY) Ltd. | AFRICAN STAR | South Africa | |
| | ASI | Aerosun International, Inc. | AEROSUN | United States | |
| | ASM | Awesome Flight Services (PTY) Ltd. | AWESOME | South Africa | |
| | ASO | Aero Slovakia | AERO NITRA | Slovakia | |
| | ASP | Airsprint | AIRSPRINT | Canada | |
| | ASR | All Star Airlines, Inc. | ALL STAR | United States | |
| | AST | Aerolíneas Del Oeste | AEROESTE | Mexico | |
| | WAP | Arrow Panama | ARROW PANAMA | Panama | |
| | ASV | Astravia-Bissau Air Transports Ltd. | ASTRAVIA | Guinea-Bissau | |
| OB | ASZ | Astrakhan Airlines | AIR ASTRAKHAN | Russia | defunct |
| | ATB | Atlantair Ltd. | STARLITE | Canada | |
| | ATD | Aerotours Dominicana | AEROTOURS | Dominican Republic | |
| | ATE | Atlantis Transportation Services, Ltd. | ATLANTIS CANADA | Canada | |
| | ATG | Aerotranscargo | MOLDCARGO | Moldova | |
| HC | ATI | Aero-Tropics Air Services | AEROTROPICS | Australia | defunct |
| | ATK | AeroTACA | AEROTACA | Colombia | defunct, Aerotaxi Casanare |
| | ATL | Atlas Air Service AG | AIR BREMEN | Germany | |
| FO | ATM | Par Avion | AIRTAS | Australia | |
| | CPV | Air Corporate | AIRCORPORATE | Italy | |
| | ATP | ASTRAL Colombia - Aerotransportes Especiales Ltda. | ASTRAL | Colombia | |
| | FEO | Aeroferinco | FERINCO | Mexico | |
| | FES | Aero Taxis Y Servicios Alfe | AERO ALFE | Mexico | |
| | FFA | Avialesookhrana | AVIALESOOKHRANA | Russia | |
| | FFB | Africair Service | FOXTROT FOXTROT | Senegal | |
| | ATR | Atlas Airlines | ATLAS-AIR | United States | |
| | ATT | Aer Turas | AERTURAS | Ireland | defunct |
| | ATU | Atlant Aerobatics Ltd. | ATLANT HUNGARY | Hungary | |
| | ATV | Avanti Air | AVANTI AIR | Germany | |
| | ATW | Aero Trades (Western) Ltd. | AERO TRADES | Canada | defunct, ICAO code no longer allocated |
| OS | AUA | Austrian Airlines | AUSTRIAN | Austria | |
| IQ | AUB | Augsburg Airways | AUGSBURG-AIR | Germany | defunct |
| | TUP | Aviastar-Tu | TUPOLEVAIR | Russia | |
| RU | ABW | AirBridge Cargo | AIRBRIDGE CARGO | Russia | Former IATA: BO |
| | TUR | ATUR | | Ecuador | |
| | TXU | ATESA Aerotaxis Ecuatorianos | ATESA | Ecuador | |
| | TXX | Austin Express | COWBOY | United States | defunct |
| | AUD | Audi Air, Inc. | AUDI AIR | United States | |
| | AUF | Augusta Air Luftfahrtunternehmen | AUGUSTA | Germany | |
| | AUM | Air Atlantic Uruguay | ATLAMUR | Uruguay | |
| | AUN | Aviones Unidos | AVIONES UNIDOS | Mexico | |
| | AUP | Avia Business Group | | Russia | |
| | SVE | Aero Servicios Expecializados | AEROESPECIAL | Mexico | |
| GR | AUR | Aurigny Air Services | AYLINE | United Kingdom | |
| NO | AUS | Aus-Air | AUS-AIR | Australia | defunct |
| AU | AUT | Austral Líneas Aéreas | AUSTRAL | Argentina | |
| | AUU | Aurora Aviation, Inc. | AURORA AIR | United States | ICAO code no longer allocated |
| | AUY | Aerolíneas Uruguayas, S.A. | AUSA | Uruguay | |
| | AVF | Aviair Aviation Ltd. | CARIBOO | Canada | |
| | AVH | AV8 Helicopters | KENT HELI | United Kingdom | |
| | AVJ | Avia Traffic Company | ATOMIC | Kyrgyzstan | |
| | AVK | AV8 Helicopters | AVIATE-COPTER | South Africa | |
| | AVM | Aviación Ejecutiva Mexicana, S.A. | AVEMEX | Mexico | |
| | AVO | Aviation at Work | AVIATION WORK | South Africa | |
| | AVP | Avcorp Registrations | AVCORP | United Kingdom | No longer used |
| | AVP | Aviacion Corporativa de Peubla | AVIA PUEBLA | Mexico | |
| | LFP | Alfa Aerospace | ALFA-SPACE | Australia | |
| | LFR | Atlantic Airfreight Aviation | LANFREIGHT | São Tomé and Príncipe | |
| | AVS | Avialsa T-35 | AVIALSA | Spain | |
| | AVT | Asia Avia Airlines | ASIAVIA | Indonesia | defunct |
| | AVU | Avia Sud Aérotaxi | AVIASUD | France | |
| | AVV | Airvantage Incorporated | AIRVANTAGE | United States | |
| | AVW | Aviator Airways | AVIATOR | Greece | |
| | AVX | Aviapaslauga | PASLAUGA | Lithuania | defunct |
| | YRG | Air Yugoslavia | YUGAIR | Serbia | defunct; operations continue under Jat Airways |
| K8 | ZAK | Airlink Zambia | | Zambia | Zambia Skyways Limited |
| | ZZM | Agence Nationale des Aerodromes et de la Meteorologie (ANAM) | | Ivory Coast | |
| 4Y | BGA | Airbus Transport International | BELUGA | France | |
| B9 | BGD | Air Bangladesh | AIR BANGLA | Bangladesh | defunct |
| | BGF | Aviodetachment-28 | BULGARIAN | Bulgaria | |
| | BGG | Aero BG | AERO BG | Mexico | |
| | BHC | Aerotaxis De La Bahia | BAHIA | Mexico | |
| | BIV | Aviaservice | AVIASERVICE | Georgia | |
| | SZA | Aerolíneas de El Salvador | AESA | El Salvador | defunct |
| | AVY | Aerovaradero, S.A. | AEROVARADERO | Cuba | |
| | AWB | Airways International, Inc. | AIRNAT | United States | |
| | AWK | Airwork | AIRWORK | New Zealand | |
| | AWL | Australian Wetleasing | AUSSIEWORLD | Australia | |
| | AWO | Awood Air Ltd. | AWOOD AIR | Canada | |
| | AWR | Arctic Wings And Rotors Ltd. | ARCTIC WINGS | Canada | |
| | ISM | Auo Airclub AIST-M | STORK | Russia | |
| | AWS | Arab Wings | ARAB WINGS | Jordan | |
| | AWV | Airwave Transport, Inc. | AIRWAVE | Canada | |
| | AWY | Aeroway, S.L. | AEROWEE | Spain | |
| | AXH | Aeromexhaga | AEROMEXHAGA | Mexico | |
| | AXI | Aeron International Airlines, Inc. | AIR FREIGHTER | United States | |
| | AXK | African Express Airways | EXPRESS JET | Kenya | Former IATA code: QA; former ICAO code: AEK; former callsign: AFRICAN EXPRESS |
| AK | AXM | AirAsia | RED CAP | Malaysia | ICAO code no longer allocated |
| D7 | XAX | AirAsia X | XANADU | Malaysia | |
| DJ | WAJ | AirAsia Japan | WING ASIA | Japan | defunct |
| I5 | IAD | AirAsia India | ARIYA | India | Founded 28. Mar 2013 |
| | AXN | Alexandair | ALEXANDROS | Greece | defunct |
| | AXP | Aeromax | AEROMAX SPAIN | Spain | |
| | BNI | Alberni Airways | ALBERNI | Canada | |
| | BNZ | Aerolíneas Bonanza | AERO BONANZA | Mexico | |
| | BOC | Aerobona | AEROBONA | Mexico | |
| | AXR | Axel Rent, S.A. | RENTAXEL | Mexico | |
| | AXS | Altus Airlines | ALTUS | United States | |
| | AXV | AVA Airlines | AVA | Iran | |
| | AXX | Avioimpex A.D.p.o. | IMPEX | Macedonia | defunct |
| 6V | AXY | Axis Airways | AXIS | France | defunct |
| | AYD | Aladia Airlines | AIRLINES ALADIA | Mexico | defunct |
| | AYK | Aykavia Aircompany | | Armenia | ICAO code no longer allocated |
| | AYM | Airman, S.L. | AIRMAN | Spain | |
| | NPT | West Atlantic UK | NEPTUNE | United Kingdom | |
| | GBN | Atlantic Airlines | ATLANTIC GABON | Gabon | |
| EX | BJK | Atlantic Airlines | BLACKJACK | United States | |
| | HHA | Atlantic Airlines de Honduras | ATLANTIC HONDURAS | Honduras | defunct |
| | AYN | Atlantic Airlines, S.A. | ATLANTIC NICARAGUA | Nicaragua | |
| | AYS | Awsaj Aviation Services | | Libya | ICAO code no longer allocated |
| | AYT | Ayeet Aviation & Tourism | AYEET | Israel | |
| 3G | AYZ | Atlant-Soyuz Airlines | ATLANT-SOYUZ | Russia | defunct |
| AZ | AZA | Alitalia | ALITALIA | Italy | defunct |
| ZE | AZE | Arcus-Air Logistic | ARCUS AIR | Germany | |
| A2 | AZI | Astra Airlines | ASTRA | Greece | |
| | AZK | Azalhelikopter | AZALHELICOPTER | Azerbaijan | |
| | AZL | Africa One | SKY AFRICA | Zambia | defunct |
| | AZM | Aerocozumel | AEROCOZUMEL | Mexico | |
| | AZP | Arizona Pacific Airways | ARIZONA PACIFIC | United States | |
| | AZS | Aviacon Zitotrans Air Company | ZITOTRANS | Russia | |
| | AZT | Azimut, S.A. | AZIMUT | Spain | |
| | AZV | Azov Avia Airlines | AZOV AVIA | Ukraine | defunct, Asov-Avia, Aircompany |
| | MHC | Aero Jomacha | AERO JOMACHA | Mexico | |
| | AZY | Arizona Airways, Inc. | ARIZAIR | United States | |
| | AZZ | Azza Transport | AZZA TRANSPORT | Sudan | |
| | NAR | Air Continental Inc | NIGHT AIR | United States | |
| | NAU | Antanik-Air | ANTANIK | Ukraine | |
| | NER | Air Newark | NEWAIR | United States | |
| | NFF | Aircraft Support and Services | | Lebanon | ICAO code no longer allocated |
| | OBA | Aerobanana | AEROBANANA | Mexico | |
| | OBK | Amako Airlines | AMAKO AIR | Nigeria | |
| R7 | OCA | Aserca Airlines | AROSCA | Venezuela | |
| | NFS | Afrique Cargo Service Senegal | | Senegal | defunct |
| | NGC | Angoservice | ANGOSERVICE | Angola | |
| | NGE | Angel Airlines | ANGEL AIR | Thailand | defunct, ICAO code no longer allocated |
| | NGF | Angel Flight America | ANGEL FLIGHT | United States | Renamed Air Charity Network in 2014 |
| | OUL | Air Atonabee | CITY EXPRESS | Canada | defunct |
| | OVA | Aero Nova | AERONOVA | Spain | |
| | XPE | Amira Air | EXPERT | Austria | |
| | XSS | Aero Express Intercontinental | INTER EXPRESS | Mexico | |
| | TLR | Air Libya Tibesti | AIR LIBYA | Libya | |
| | OVC | Aerovic | | Ecuador | |
| | RVE | Airventure | AIRVENTURE | Belgium | |
| | RVI | Aero Servicios | AERO SERVICIOS | Mexico | |
| | RVL | Airvallee | AIR VALLEE | Italy | |
| | OVE | Aeromover | AEROMOVER | Mexico | |
| | OVI | Aerovías Ejecutivas | VIAS EJECUTIVAS | Mexico | |
| | PTD | Aero Servicio Pity | PITY | Mexico | |
| | PTE | Aero Copter | AERO-COP | Mexico | |
| | PLL | Air Pal | AIRPAL | Spain | Escuela De Pilots |
| | PLM | Air Pullmantur | PULLMANTUR | Spain | |
| RX | AEH | Aviaexpress | AVEX | Hungary | defunct |
| | PSG | Aviones Para Servirle | SERVIAVIONES | Mexico | |
| | SLU | Avio Sluzba | AVIO SLUZBA | Serbia | |
| | SCU | Air Scorpio | SCORPIO UNIVERS | Bulgaria | |
| | SIP | Air Spirit | AIR SPIRIT | United States | |
| | BMV | Alatau Airlines | OLIGA | Kazakhstan | |
| | GUG | Aviateca | AVIATECA | Guatemala | |
| | PXX | Aroostook Aviation | PINE STATE | United States | |
| | PYC | Aeropycsa | AEROPYCSA | Mexico | |
| | PVK | Association of Private Pilots of Kazakhstan | BORIS | Kazakhstan | ICAO code no longer allocated |
| | BAS | Aero Services | AEROSERV | Barbados | |
| | BBT | Air Bashkortostan | AGYDAL | Russia | defunct |
| | MCY | Ambulance Air Africa | MERCY | South Africa | |
| MQ | EGF | American Eagle Airlines | EAGLE FLIGHT | United States | Renamed Envoy Air, ICAO Code and Callsign withdrawn in 2014 |
| | PUE | Aeropuelche | PUELCHE | Chile | |
| | PUT | Aeroput | | Serbia | defunct |
| ZS | AZI | Azzurra Air | AZZURRA | Italy | defunct |
| FF | | Airshop | | Netherlands | |
| ML | ETC | African Transport Trading and Investment Company | TRANATTICO | Sudan | |
| | XCT | Aero Costa Taxi Aéreo | AEROCOSTAXI | Mexico | |
| | VRO | Aerovitro | AEROVITRO | Mexico | |
| | VRI | Aerotaxi Villa Rica | VILLARICA | Mexico | |
| | VEG | Aerovega | AEROVEGA | Mexico | |
| | VVG | Aerovilla | AEROVILLA | Colombia | |
| | VLR | Aerolíneas Villaverde | VILLAVERDE | Mexico | |
| WI | WIL | Aero Air | WILLIAMETTE | United States | |
| | VEJ | Aero Ejecutivos | VENEJECUTIV | Venezuela | |
| | WAB | Aero Industries Inc | WABASH | United States | |
| | VNG | Aero Servicios Vanguardia | VANGUARDIA | Mexico | |
| | VAD | Aero Taxi Los Valles | VALLES | Spain | |
| | VMR | Aero Vilamoura | AERO VILAMOURA | Portugal | ICAO code no longer allocated |
| | VLS | Aero Virel | VIREL | Mexico | |
| | XAA | Aeronautical Radio Inc | ROCKFISH|United States | |
| | VUO | Aerovuelox | AEROVUELOX | Mexico | |
| | VTM | Aeronaves TSM | AERONAVES TSM | Mexico | |
| VU | VUN | Air Ivoire | AIRIVOIRE | Ivory Coast | defunct |
| BP | BOT | Air Botswana | BOTSWANA | Botswana | |
| | XPR | Air-Rep | | United States | |
| | XLL | Air Excel | TINGA-TINGA | Tanzania | |
| | VAE | Air Evans | AIR-EVANS | Spain | Ecuela de Pilotos Privados |
| | WHY | Air Sorel | AIR SOREL | Canada | |
| | WDR | Air Net Private Charter | WIND RIDER | United States | |
| | XEC | Air Executive Charter | | Germany | |
| GS | UPA | Air Foyle | FOYLE | United Kingdom | defunct, ICAO code no longer allocated |
| | VTY | Air Midwest (Nigeria) | VICTORY | Nigeria | |
| VT | VTA | Air Tahiti | AIR TAHITI | French Polynesia | |
| 3N | URG | Air Urga | URGA | Ukraine | |
| | VDR | Air Vardar | VARDAR | Macedonia | ICAO code in use by another company, call sign no longer allocated |
| VL | VIM | Air VIA | CRYSTAL | Bulgaria | |
| | WLR | Air Walser | AIRWALSER | Italy | |
| | URA | Aircompany Rosavia | ROSAVIA | Ukraine | |
| | XLB | Aircraft Performance Group | | United States | |
| | WLA | Airwaves Airlink | AIRLIMITED | Zambia | |
| | XFX | Airways Corporation of New Zealand | AIRCORP | New Zealand | |
| | WAY | Airways | GARONNE | France | |
| | WGS | Airwings oy | AIRWINGS | Finland | |
| | XAK | Airkenya | SUNEXPRESS | Kenya | |
| | WPK | Air-Lift Associates | WOLFPACK | United States | |
| | VAB | Airtrans Ltd | | Russia | |
| | URP | ARP 410 Airlines | AIR-ARP | Ukraine | |
| | WPR | Auckland Regional Rescue Helicopter Trust | WESTPAC RESCUE | New Zealand | |
| | URR | Aurora Airlines | AIR AURORA | Slovenia | defunct, ICAO code no longer allocated |
| | UST | Austro Aéreo | AUSTRO AEREO | Ecuador | |
| | WLT | Aviation Partners | WINGLET | United States | |
| | VLV | Avialift Vladivostok | VLADLIFT | Russia | |
| | VME | Aviación Comercial de América | AVIAMERICA | Mexico | |
| | VVA | Aviast Air | IALSI | Russia | defunct |
| | WLV | Aviation North | WOLVERINE | United States | |
| FK | WTA | Africa West | WEST TOGO | Togo | |
| | VNT | Avient Air Zambia | AVIENT | Zambia | |
| | VZR | Aviazur | IAZUR | France | |
| | VID | Aviaprad | AVIAPRAD | Russia | defunct |
| G2 | VXG | Avirex | AVIREX-GABON | Gabon | |
| | VXX | Aviaexpress Aircompany | EXPRESSAVIA | Ukraine | |
| | XAM | AMR Services Corporation | ALLIANCE | United States | |
| | XAO | Airline Operations Services | | United States | |
| | VAZ | Airlines 400 | REMONT AIR | Russia | |
| V8 | VAS | ATRAN Cargo Airlines | ATRAN | Russian Federation | |
| | VAM | Ameravia | AMERAVIA | Uruguay | |
| K6 | KHV | Angkor Air | AIR ANGKOR | Cambodia | |
| | VBC | AVB-2004 Ltd | AIR VICTOR | Bulgaria | |
| | XKX | ASECNA | | France | |
| | XAT | AT and T Aviation Division | | United States | |
| | CAJ | Air Caraibes Atlantique | CAR LINE | France | |
| | CAO | Air China Cargo | AIRCHINA FREIGHT | China | |
| | CBE | Aerovías Caribe | AEROCARIBE | Mexico | |
| | CBO | Aerotaxi del Cabo | TAXI CABO | Mexico | |
| | CBS | Air Columbus | AIR COLUMBUS | Ukraine | |
| | CBV | Aereo Cabo | CABOAEREO | Mexico | |
| CA | CCA | Air China | AIR CHINA | China | |
| | CDA | Aerocardal | CARDAL | Chile | |
| Q6 | CDP | Aero Condor Peru | CONDOR-PERU | Peru | |
| | CDU | Aerotrans | | Russia | |
| | CDV | Airline Skol | SKOL | Russia | |
| | CFF | Aerofan | AEROFAN | Spain | |
| | CFR | Africa One | | Democratic Republic of the Congo | defunct |
| | CFV | Aero Calafia | CALAFIA | Mexico | |
| | CGB | Air Cargo Belize | CARGO BELIZE | Belize | |
| | CGV | Aero Clube Do Algarve | CLUBE ALGARVE | Portugal | |
| | CGW | Air Great Wall | CHANGCHENG | China | defunct |
| | CHJ | Aircompany Chaika | AIR CHAIKA | Ukraine | |
| | CHR | Air Charter Services | ZAIRE CHARTER | Democratic Republic of the Congo | |
| | CHV | Air Charter Professionals | CHARTAIR | United States | |
| | CID | Asia Continental Airlines | ACID | Kazakhstan | defunct, ICAO code no longer allocated |
| 5F | CIR | Arctic Circle Air Service | AIR ARCTIC | United States | defunct 2011 |
| | CKL | Aviation Charter Services | CIRCLE CITY | United States | |
| | CLL | Aerovías Castillo | AEROCASTILLO | Mexico | |
| | CLP | Aero Club De Portugal | CLUB PORTUGAL | Portugal | |
| | CMF | Air Care Alliance | COMPASSION | United States | |
| | CNE | Air Toronto | CONNECTOR | Canada | |
| | CNH | Aquila Air | CHENANGO | United States | |
| | CNU | Air Consul | AIR CONSUL | Spain | |
| | CNX | AllCanada Express | CANEX | Canada | defunct |
| | CPF | Airtechservice | TECHSERVICE | Ukraine | defunct |
| QC | CRD | Air Corridor | AIR CORRIDOR | Mozambique | defunct |
| NV | CRF | Air Central | AIR CENTRAL | Japan | Ceased operations 2010 |
| | CRJ | Air Cruzal | AIR CRUZAL | Angola | |
| | CRP | Aerotransportes Corporativos | AEROTRANSCORP | Mexico | |
| | CRQ | Air Creebec | CREE | Canada | |
| | CTA | Aero Charter and Transport | CHAR-TRAN | United States | |
| | CTE | Air Tenglong | TENGLONG | China | |
| | CTR | Aerolíneas Centauro | CENTAURO | Mexico | |
| | CUO | Aerocuahonte | CUAHONTE | Mexico | |
| CV | CVA | Air Chathams | CHATHAM | New Zealand | |
| CW | CWM | Air Marshall Islands | AIR MARSHALLS | Marshall Islands | |
| | CWP | Australian Customs Service | COASTWATCH | Australia | |
| | CYL | Air One Cityliner | CITYLINER | Italy | |
| | CYO | Air Transport | COYOTE | United States | |
| | CYE | Aerocheyenne | AEROCHEYENNE | Mexico | |
| AH | DAH | Air Algérie | AIR ALGERIE | Algeria | |
| | DAP | Aerovías DAP | DAP | Chile | |
| | DBA | Air Alpha | DOUBLE-A | United States | |
| | DBD | Air Niagara Express | AIR NIAGARA | Canada | |
| | DEF | Aviation Defense Service | TIRPA | France | |
| | DEG | Air Service Groningen | DEGGER | Netherlands | ICAO code and call sign no longer allocated |
| ER | DHL | Astar Air Cargo | D-H-L | United States | defunct, DHL |
| | DHM | Archer Aviation | ARCHER | United Kingdom | ICAO code no longer allocated |
| | DIC | Aeromedica | AEROMEDICA | Mexico | |
| | DIN | Aerodin | AERODIN | Mexico | |
| | DJU | Air Djibouti | AIR DJIB | Djibouti | defunct |
| EN | DLA | Air Dolomiti | DOLOMITI | Italy | |
| | DLS | Aero Modelo | AEROMODELO | Mexico | |
| | DLU | Aerolíneas del Sur | DEL SUR | Chile | defunct |
| | DMC | Aerodinamica de Monterrey | DINAMICAMONT | Mexico | |
| | DMI | Aeroservicios Dinamicos | AERODINAMICO | Mexico | |
| | DML | Aerotaxis Dosmil | | Mexico | |
| | DNA | Aerodespachos de El Salvador | AERODESPACHOS | El Salvador | |
| | DNC | Aerodynamics Málaga | FLYINGOLIVE | Spain | |
| | DNJ | Aerodynamics Incorporated | DYNAJET | United States | |
| NM | DRD | Air Madrid | ALADA AIR | Spain | defunct |
| | DRM | Airways Flight Training | DARTMOOR | United Kingdom | |
| | DRO | Aeronaves Del Noreste | AERONORESTE | Mexico | |
| 6R | DRU | Alrosa Air Company | MIRNY | Russia | |
| | DSK | Aero Algarve | SKYBANNER | Portugal | ICAO code no longer allocated |
| | DST | Aex Air | DESERT | United States | |
| | EAT | Air Transport | TRANS EUROPE | Slovakia | |
| EE | EAY | Aero Airlines | REVAL | Estonia | defunct |
| | EBC | Aero Ejecutivo De Baja California | CALIXJET | Mexico | |
| 4F | ECE | Air City | AIRCITY | Germany | |
| | ECG | Aero Ejecutivos RCG | EJECTUIVOS RCG | Mexico | |
| | ECL | Aeronáutica Castellana | AERO CASTELLANA | Spain | |
| | ECM | Aerolíneas Comerciales | AERO COMERCIALES | Mexico | |
| | EDA | Aerolineas Nacionales Del Ecuador | ANDES | Ecuador | defunct |
| | EET | Air Este | AESTE | Spain | |
| | EFC | Air Mana | FLIGHT TAXI | France | |
| | EJP | Aeroservicios Ejecutivos Corporativos | EJECCORPORATIVOS | Mexico | |
| E8 | ELG | Alpi Eagles | ALPI EAGLES | Italy | defunct, ICAO code no longer allocated |
| | ALX | ALPI Jets | ALPIJETS | Austria | |
| | END | Arrendadora y Transportadora Aérea | ARRENDADORA | Mexico | |
| | ENW | Aeronaves Del Noroeste | AERONOR | Spain | |
| | EOL | Airailes | EOLE | France | |
| RF | EOK | Aero K | AEROHANKUK | South Korea | established in May 2016; commenced operations on 15 April 2021 |
| | EOM | Aero Ermes | AERO ERMES | Mexico | |
| | EPL | Aero Transportes Empresariales | EMPRESARIALES | Mexico | |
| | EPE | Aero Empresarial | AEROEMPRESARIAL | Mexico | |
| KY | EQL | Air São Tomé and Príncipe | EQUATORIAL | São Tomé and Príncipe | defunct |
| | ERG | Avianergo | AVIANERGO | Russia | defunct |
| | ERI | Aero Servicios Regiomontanos | ASERGIO | Mexico | |
| | ERK | Aerosec | AEROSEC | Chile | |
| | ERM | Aeromaan | EOMAAN | Mexico | |
| | ESB | Aereosaba | AEREOSABA | Mexico | |
| | ESO | Avitat | | United Kingdom | |
| | ESU | Aerolíneas Ejecutivas Del Sureste | ALESUR | Mexico | |
| | ESZ | Aeronáutica La Esperanza | ESPERANZA | Mexico | |
| | ETE | Aero Siete | AEROSIETE | Mexico | |
| | EUK | Air Atlanta Europe | SNOWBIRD | United Kingdom | defunct |
| | EVE | Air Evex | SUNBEAM | Germany | |
| | EVR | Aeronautical Academy of Europe | DIANA | Portugal | |
| E2/E6 | EWE/EWL | Eurowings Europe | EUROPWINGS BLACK PEARL | Austria | |
| | EXG | Air Exchange | EXCHANGE | United States | |
| | FAC | Atlantic Helicopters | FAROECOPTER | Denmark | |
| | FAG | Argentine Air Force | FUAER | Argentina | |
| PC | FAJ | Air Fiji | FIJIAIR | Fiji | defunct |
| | FAN | AF-Air International | FANBIRD | Angola | |
| | FBW | Aviation Data Systems | | United States | |
| | FCI | Air Carriers | FAST CHECK | United States | |
| | FCO | Aerofrisco | AEROFRISCO | Mexico | |
| | FCU | Alfa 4 | | Mexico | |
| JH | FDA | Fuji Dream Airlines | FUJI DREAM | Japan | |
| | FDS | African Medical and Research Foundation | FLYDOC | Kenya | |
| | FGT | Aero Freight | FREIAERO | Mexico | |
| | FIC | Aerosafin | AEROSAFIN | Mexico | |
| OF | FIF | Air Finland | AIR FINLAND | Finland | |
| | FII | Aerodata Flight Inspection | FLIGHT CHECKER | Germany | ICAO code no longer allocated |
| | FIX | Airfix Aviation | AIRFIX | Finland | |
| FJ | FJI | Fiji Airways | PACIFIC | Fiji | |
| | FLD | Air Falcon | | Pakistan | |
| RC | FLI | Atlantic Airways | FAROELINE | Faroe Islands | |
| | FLP | Aeroclub Flaps | AEROCLUB FLAPS | Spain | defunct |
| QH | FLZ | Aero Leasing | AIR FLORIDA | United States | dba Air Florida |
| | FMT | Air Fret De Mauritanie | | Mauritania | |
| | FNM | Avio Nord | | Italy | |
| | FNO | Aeroflota Del Noroeste | RIAZOR | Spain | |
| | FNX | Aero Fenix | AERO FENIX | France | ICAO code no longer allocated |
| | FPY | African Company Airlines | AFRICOMPANY | Democratic Republic of the Congo | Defunct. ICAO code in use by another company. |
| | FRJ | Afrijet Airlines | AFRIJET | Nigeria | |
| | FRK | Afrika Aviation Handlers | AFRIFAST | Kenya | |
| | FRQ | Afrique Chart'air | CHARTER AFRIQUE | Cameroon | |
| | FRT | Aerofreight Airlines | | Russia | |
| | FST | Aeros Limited | FAST TRACK | United Kingdom | ICAO code no longer allocated |
| | FTC | Air Affaires Tchad | AFFAIRES TCHAD | Chad | |
| NY | FXI | Air Iceland | FAXI | Iceland | |
| 2P | GAP | Air Philippines | ORIENT PACIFIC | Philippines | |
| | GAU | Aerogaucho | AEROGAUCHO | Uruguay | |
| | GBJ | Aero Business Charter | GLOBAL JET | Germany | |
| | GCF | Aeronor | AEROCARTO | Spain | |
| | GCK | Aerogem Cargo | AEROGEM | Ghana | defunct |
| | GFO | Aerovías del Golfo | AEROVIAS GOLFO | Mexico | |
| | GGL | Aeronáutica | GIRA GLOBO | Angola | |
| ZX | GGN | Air Georgian | GEORGIAN | Canada | |
| | GHL | Aviance UK | HANDLING | United Kingdom | Gatwick Handling |
| | GHN | Air Ghana | AIR GHANA | Ghana | |
| | GIL | African International Transport | AFRICAN TRANSPORT | Guinea | |
| 2U | GIP | Air Guinee Express | FUTURE EXPRESS | Guinea | |
| | GIZ | Africa Airlines | AFRILENS | Guinea | |
| | GLL | Air Gemini | TWINS | Angola | |
| | GLT | Aero Charter | GASLIGHT | United States | |
| | GME | Aguilas Mayas Internacional | MAYAN EAGLES | Guatemala | |
| | GMM | Aerotaxis Guamuchil | AEROGUAMUCHIL | Mexico | |
| | GMS | Aeroservicios Gama | SERVICIOS GAMA | Mexico | |
| 0A | GNT | Amber Air | GINTA | Lithuania | |
| | GOA | Alberta Government | ALBERTA | Canada | |
| | GRE | Air Scotland | GREECE AIRWAYS | Greece | |
| DA | GRG | Air Georgia | AIR GEORGIA | Georgia | |
| | GRI | Air Cargo Center | | São Tomé and Príncipe | |
| LL | GRO | Allegro | ALLEGRO | Mexico | defunct (IATA code reallocated) |
| | GRR | Agroar - Trabalhos Aéreos | AGROAR | Portugal | |
| | GRX | Aircompany Grodno | GRODNO | Belarus | |
| | GSP | Airlift Alaska | GREEN SPEED | United States | |
| | GSV | Agrocentr-Avia | AGRAV | Kazakhstan | |
| | GTC | Altin Havayolu Tasimaciligi Turizm Ve Ticaret | GOLDEN WINGS | Turkey | |
| 5Y | GTI | Atlas Air | GIANT | United States | |
| | GTP | Aerotaxi Grupo Tampico | GRUPOTAMPICO | Mexico | |
| | GUA | Aerotaxis de Aguascalientes | AGUASCALIENTES | Mexico | |
| GG | GUY | Air Guyane | GREEN BIRD | French Guiana | |
| | GVI | Air Victoria Georgia | IRINA | Georgia | |
| H9 | HAD | Air d'Ayiti | HAITI AVIA | Haiti | |
| GG | HAH | Air Comores International | AIR COMORES | Comoros | |
| | HAT | Air Taxi | TAXI BIRD | France | |
| | HEI | Aerohein | AEROHEIN | Chile | |
| | HGH | Atlantic Air Lift | HIGHER | France | |
| | HID | Aviación Ejecutiva De Hildago | EJECUTIVA HIDALGO | Mexico | |
| | HJA | Air Haiti | AIRHAITI | Haiti | |
| HD | HLN | Air Holland | ORANGE | Netherlands | defunct |
| | HJT | Al Rais Cargo | AL-RAIS CARGO | United Arab Emirates | |
| | HKH | Air-Invest | HAWKHUNGARY | Hungary | |
| | HMA | Air Tahoma | TAHOMA | United States | ICAO code no longer allocated |
| | HMT | Air Nova | HAMILTON | United Kingdom | ICAO code no longer allocated |
| | HOM | Aero Homex | AERO HOMEX | Mexico | |
| | HPO | Almiron Aviation | ALMIRON | Uganda | |
| | HQO | Avinor | | Norway | |
| | HYR | Airlink Airways | HIGHFLYER | Ireland | |
| 8C | HZT | Air Horizon | HORIZON TOGO | Togo | |
| | ICM | Air Inter Cameroun | INTER-CAMEROUN | Cameroon | |
| | IFI | Air Lift | HELLAS LIFT | Greece | |
| | IKM | Aero Survey | EASY SHUTTLE | Ghana | Callsign changed from GHANA SURVEY |
| | ILK | Aero Airline | ILEK | Kazakhstan | |
| | IME | Airtime Charters | AIRTIME | United Kingdom | ICAO code no longer allocated |
| | IMN | Aerotaxis Cimarron | TAXI CIMARRON | Mexico | |
| | INA | Aero Internacional | AERO-NACIONAL | Mexico | |
| | ING | Aeroingenieria | AEROINGE | Chile | defunct |
| | INO | Aeroservicios Intergrados de Norte | INTENOR | Mexico | |
| | IPL | Airpull Aviation | IPULL | Spain | |
| | IRD | Arvand Airlines | ARVAND | Iran | |
| | IRH | Atlas Aviation Group | ATLAS AVIA | Iran | |
| | IRW | Aram Airline | ARAM | Iran | |
| | IRX | Aria Tour | ARIA | Iran | |
| | ITE | Aerotaxi S.R.O. | AEROTAXI | Czech Republic | |
| | ITF | Avita-Servicos Aéreos | AIR AVITA | Angola | |
| | ITI | AirSwift | AIRSWIFT | Philippines | |
| | ITO | Aero Citro | AERO CITRO | Mexico | |
| | IVE | Air Executive | COMPANY EXEC | Spain | |
| | IWS | Aviainvest | | Russia | |
| W9 | JAB | Air Bagan | AIR BAGAN | Myanmar | |
| | JAD | Aerojal | AEROJAL | Mexico | |
| | JAR | Airlink | AIRLINK | Austria | |
| | JEE | Ambjek Air Services | AMBJEK AIR | Nigeria | |
| | JKH | JETKONTOR AG | JETKONTOR | Germany | |
| | UTX | Avfinity | | United States | |
| | JMR | Alexandair | ALEXANDAIR | Canada | |
| | JMX | Air Jamaica Express | JAMAICA EXPRESS | Jamaica | |
| | JOA | Air Swift Aviation | | Australia | |
| | JOB | Aerojobeni | JOBENI | Mexico | |
| IP | JOL | Atyrau Air Ways | EDIL | Kazakhstan | |
| | JPR | Aerosmith Aviation | JASPER | United States | ICAO code no longer allocated |
| | JTS | Arrendamiento de Aviones Jets | AVIONESJETS | Mexico | |
| | JUA | Aero Juarez | JUAREZ | Mexico | |
| QK | JZA | Air Canada Jazz | JAZZ | Canada | |
| | KAA | Asia Aero Survey and Consulting Engineers | AASCO | Republic of Korea | ICAO code no longer allocated |
| | KAD | Air Kirovograd | AIR KIROVOGRAD | Ukraine | |
| | KAM | Air Mach | ICO-AIR | Italy | |
| | KAV | Air Kufra | AIRKUFRA | Libya | |
| | KEK | Arkhabay | ARKHABAY | Kazakhstan | ICAO code no longer allocated |
| | KFK | Aero Charter Krifka | KRIFKA AIR | Austria | |
| | KFT | Air Kraft Mir | AIR KRAFT MIR | Uzbekistan | |
| | KGD | Air Concorde | CONCORDE AIR | Bulgaria | |
| | KHH | Alexandria Airlines | | Egypt | |
| | KIE | Afit | TWEETY | Germany | |
| | KKB | Air South | KHAKI BLUE | United States | |
| KK | KKK | Atlasjet | ATLASJET | Turkey | |
| | KLB | Air Mali International | TRANS MALI | Mali | |
| | KLZ | Aerokaluz | AEROKALUZ | Mexico | |
| JS | KOR | Air Koryo | AIR KORYO | North Korea | |
| | KOY | Araiavia | ALEKS | Kazakhstan | |
| | KRE | AeroSucre | AEROSUCRE | Colombia | |
| | KRT | Air Kokshetau | KOKTA | Kazakhstan | ICAO code no longer allocated |
| | KSI | Air Kissari | KISSARI | Angola | |
| | KTN | Aeronavigaciya | AERONAVIGACIYA | Ukraine | |
| | KVR | Alliance Avia | KAVAIR | Kazakhstan | |
| | KYC | Av Atlantic | DOLPHIN | United States | |
| KC | KZR | Air Astana | ASTANALINE | Kazakhstan | |
| | LAG | Aviation Legacy | AVILEG | Gambia | |
| | | Aerovías De Lagos | AEROLAGOS | Mexico | Was LAG |
| LV | LBC | Albanian Airlines | ALBANIAN | Albania | |
| | LBI | Albisa | ALBISA | Mexico | |
| | LBW | Albatros Airways | ALBANWAYS | Albania | |
| | LDG | Aerolíneas Aéreas Ejecutivas De Durango | DURANGO | Mexico | |
| 3S | BOX | Aerologic | GERMAN CARGO | Germany | |
| | LDN | Al-Donas Airlines | ALDONAS AIR | Nigeria | |
| QP | AKJ | Akasa Air | AKASA AIR | India |
| | LDR | Aero Lider | AEROLIDER | Mexico | |
| | LEM | Aleem | | Egypt | |
| | LET | Aerolíneas Ejecutivas | MEXEJECUTIV | Mexico | |
| H7 | LFA | Air Alfa | AIR ALFA | Turkey | |
| | LFC | Aero Control Air | LIFE FLIGHT CANADA | Canada | defunct |
| | LGN | Aerolaguna | AEROLAGUNA | Mexico | |
| | LHR | Al Ahram Aviation | AL AHRAM | Egypt | |
| D4 | LID | Alidaunia | ALIDA | Italy | |
| | LIE | Al-Dawood Air | AL-DAWOOD AIR | Nigeria | |
| | LKP | American Aviation | LAKE POWELL | United States | ICAO code no longer allocated |
| | LKS | Airlink Solutions | AIRLIN | Spain | |
| | LKY | Air Solutions | LUCKY | United States | |
| 9I | LLR | Air India Regional | ALLIED | India | |
| | LMA | Aerolima | AEROLIMA | Mexico | |
| | LML | Alamia Air | ALAMIA AIR | Libya | ICAO code no longer allocated |
| | LMP | Air Plus Argentina | AIR FLIGHT | Argentina | |
| | LMT | Almaty Aviation | ALMATY | Kazakhstan | |
| | LMX | Aerolíneas Mexicanas J S | LINEAS MEXICANAS | Mexico | |
| | LMY | Air Almaty | AGLEB | Kazakhstan | |
| | LMZ | Air Almaty ZK | ALUNK | Kazakhstan | |
| XL | LNE | Aerolane | AEROLANE | Ecuador | Líneas Aéreas Nacionales Del Ecuador |
| 4Z | LNK | Airlink | LINK | South Africa | |
| | LNT | Aerolíneas Internacionales | LINEAINT | Mexico | |
| | LOK | Alok Air | ALOK AIR | Sudan | |
| | LOU | Air Saint Louis | AIR SAINTLOUIS | Senegal | |
| FL | LPA | Air Leap | LEAP | Sweden | |
| | LPC | Alpine Aviation | NETSTAR | South Africa | |
| A6 | LPV | Air Alps Aviation | ALPAV | Austria | |
| | LRO | Alrosa-Avia | ALROSA | Russia | |
| | LRW | Al Rida Airways | AL RIDA | Mauritania | |
| | LSK | Aurela | AURELA | Lithuania | |
| | LSM | Aerobusinessservice | | Russia | defunct |
| | LSR | Alsair | ALSAIR | France | |
| | LTI | Aerotaxis Latinoamericanos | LATINO | Mexico | |
| | LUC | Albinati Aeronautics | ALBINATI | Switzerland | |
| TD | LUR | Atlantis European Airways | ATLANTIS | Armenia | defunct |
| | LVN | Aliven | ALIVEN | Italy | |
| | LVR | Aviavilsa | AVIAVILSA | Lithuania | |
| L8 | LXG | Air Luxor GB | LUXOR GOLF | Guinea-Bissau | |
| LK | LXR | Air Luxor | AIRLUXOR | Portugal | ICAO code no longer allocated |
| | LYT | Apatas Air | APATAS | Lithuania | |
| | LZP | Air Ban | DOC AIR | Bulgaria | |
| | LZR | Air Lazur | LAZUR BEE-GEE | Bulgaria | |
| | MAM | Aeródromo De La Mancha | AEROMAN | Spain | |
| MK | MAU | Air Mauritius | AIRMAURITIUS | Mauritius | |
| | MBA | Avag Air | AVAG AIR | Austria | |
| | MBB | Air Manas | AIR MANAS | Kyrgyzstan | |
| | MBC | Airjet Exploracao Aerea de Carga | MABECO | Angola | |
| | MBV | Aeriantur-M | AEREM | Moldova | defunct |
| | MCB | Air Mercia | WESTMID | United Kingdom | |
| | MCD | Air Medical | AIR MED | United Kingdom | |
| | MCO | Aerolíneas Marcos | MARCOS | Mexico | |
| | MDC | Atlantic Aero and Mid-Atlantic Freight | NIGHT SHIP | United States | |
| MD | MDG | Air Madagascar | AIR MADAGASCAR | Madagascar | |
| | MDX | Aerosud Charter | MEDAIR | South Africa | |
| | MEF | Air Meridan | EMPENNAGE | Nigeria | |
| | MFL | Aero McFly | MCFLY | Mexico | |
| | MGE | Asia Pacific Airlines | MAGELLAN | United States | |
| | MGS | Aeromagar | AEROMAGAR | Mexico | |
| | MIE | Aero Premier De Mexico | AEROPREMIER | Mexico | |
| 9U | MLD | Air Moldova | AIR MOLDOVA | Moldova | |
| | MLF | Amal Airlines | AMAL | Djibouti | |
| L9 | MLI | Air Mali | AIR MALI | Mali | defunct |
| | MLN | Air Madeleine | AIR MADELEINE | Canada | |
| | MMC | Aermarche | AERMARCHE | Italy | |
| | MMD | Air Alsie | MERMAID | Denmark | |
| | MMM | Aviation Company Meridian | AVIAMERIDIAN | Russia | |
| | MMP | AMP Incorporated | AMP-INC | United States | |
| | MMX | Airmax | PERUMAX | Peru | |
| | MNE | Aerolíneas Amanecer | AEROAMANECER | Mexico | |
| | MNG | Aero Mongolia | AERO MONGOLIA | Mongolia | |
| | MOC | Air Monarch Cargo | MONARCH CARGO | Mexico | |
| | MOP | Aeropublicitaria De Angola | PUBLICITARIA | Angola | |
| | MOR | Aerolíneas De Morelia | AEROMORELIA | Mexico | |
| A7 | MPD | Air Plus Comet | RED COMET | Spain | |
| QO | MPX | Aeromexpress | AEROMEXPRESS | Mexico | |
| | MQT | Air ITM | MUSKETEER | France | |
| | MRL | Aeromorelos | AEROMORELOS | Mexico | |
| | MRM | Aerocharter | MARITIME | Canada | |
| MR | MRT | Air Mauritanie | MIKE ROMEO | Mauritania | |
| SM | MSC | Air Cairo | AIR CAIRO | Egypt | |
| | MSK | Air Sport | AIR SPORT | Bulgaria | |
| | MSM | Aeromas | AEROMAS EXPRESS | Uruguay | |
| | MSO | Aerolíneas Mesoamericanas | MESO AMERICANAS | Mexico | |
| | MSV | Aero-Kamov | AERAFKAM | Russia | |
| | MTB | Aerotaxis Metropolitanos | AEROMETROPOLIS | Mexico | |
| | MTE | Aeromet Línea Aérea | AEROMET | Chile | defunct |
| | MTK | Air Metack | AIRMETACK | Angola | |
| | MTY | Air Montegomery | MONTY | United Kingdom | ICAO code no longer allocated |
| | MXO | Aerotaxi Mexicano | MAXAERO | Mexico | |
| | MYS | Aero Yaqui Mayo | AERO YAQUI | Mexico | |
| | MZK | AVC Airlines | | Japan | |
| | MZL | Aerovías Montes Azules | MONTES AZULES | Mexico | |
| 2V* | | Amtrak | | United States | Train services only |
| F4 | NBK | Albarka Air | AL-AIR | Nigeria | |
| | NEL | Aero Servicios de Nuevo Laredo | AEROLAREDO | Mexico | |
| | NGV | Angoavia | ANGOAVIA | Angola | |
| | NID | Aeroni | AERONI | Mexico | |
| | NIE | Aeroejecutiva Nieto | AERONIETO | Mexico | |
| AJ | NIG | Aero Contractors | AEROLINE | Nigeria | |
| | NKZ | Aerokuzbass | NOVOKUZNETSK | Russia | |
| | NRE | Aviones Are | AVIONES ARE | Mexico | |
| | NRS | Atlantic Richfield Company | NORTH SLOPE | United States | |
| | NSO | Aerolíneas Sosa | SOSA | Honduras | |
| | NTD | Aero Norte | | Mexico | |
| | NTV | Air Inter Ivoire | INTER-IVOIRE | Ivory Coast | |
| | NUL | Aeroservicios De Nuevo Leon | SERVICIOS NUEVOLEON | Mexico | |
| | NVI | Avial NV Aviation Company | NEW AVIAL | Russia | |
| | NWG | Airwing | NORWING | Norway | |
| | NXA | Air Next | BLUE-DOLPHIN | Japan | |
| | OAO | Arkhangelsk 2 Aviation Division | DVINA | Russia | |
| | OGI | Aerogisa | AEROGISA | Mexico | |
| | OLV | Aerolíneas Olve | OLVE | Mexico | |
| | OMG | Aeromega | OMEGA | United Kingdom | |
| | ONR | Air One Nine | EDER | Libya | ICAO code no longer allocated |
| | ONT | Air Ontario | ONTARIO | Canada | |
| | ORP | Aerocorp | CORPSA | Mexico | IATA changed to RCP; callsign changed to AEROCORPSA |
| | OSN | Aerosan | AEROSAN | Mexico | |
| | OSO | Aviapartner Limited Company | | Russia | |
| | PAJ | Aliparma | ALIPARMA | Italy | |
| | PBT | Air Parabet | PARABET | Bangladesh | |
| 8Y | PBU | Air Burundi | AIR-BURUNDI | Burundi | |
| | PCG | Aeropostal Cargo de Mexico | POSTAL CARGO | Mexico | |
| | PCK | Air Pack Express | AIRPACK EXPRESS | Spain | |
| | PCS | Air Palace | AIR PALACE | Mexico | |
| OT | PEL | Aeropelican Air Services | PELICAN | Australia | |
| | PEV | Peoples Vienna Line | PEOPLES | Austria | |
| | PFI | Aerolíneas Chihuahua | PACIFICO CHIHUAHUA | Mexico | |
| | PFT | Air Cargo Express International | PROFREIGHT | United States | |
| | PHR | Al Farana Airline | PHARAOH | Egypt | |
| | PHW | Ave.com | PHOENIX SHARJAH | United Arab Emirates | ICAO code no longer allocated |
| | PIE | Air South West | PIRATE | United Kingdom | |
| | PIF | Aeroservicios California Pacifico | AEROCALPA | Mexico | |
| | PKA | AST Pakistan Airways | PAKISTAN AIRWAY | Pakistan | |
| | PNL | Aero Personal | AEROPERSONAL | Mexico | |
| | PNU | Aero Servicios Platinum | AERO PLATINUM | Mexico | |
| | POY | Apoyo Aéreo | APOYO AEREO | Mexico | |
| | PRT | Atlantic Coast Jet | PATRIOT | United States | |
| AD | PRZ | Air Paradise International | RADISAIR | Indonesia | Defunct 2005 |
| | PZA | Aéreo Taxi Paraza | AEREO PARAZA | Mexico | |
| QD | QCL | Air Class Líneas Aéreas | ACLA | Uruguay | |
| | QEA | Aviation Consultancy Office | | Australia | |
| | QAT | Aero Taxi | AIR QUASAR | Canada | defunct |
| | QKC | Aero Taxi Aviation | QUAKER CITY | United States | |
| | QLA | Aviation Quebec Labrador | QUEBEC LABRADOR | Canada | |
| QS | QSC | African Safari Airways | ZEBRA | Kenya | |
| | QUI | Aero Quimmco | QUIMMCO | Mexico | |
| | RAD | Alada | AIR ALADA | Angola | |
| | RAI | Aerotur Air | DIASA | Kazakhstan | |
| | RAP | Air Center Helicopters | RAPTOR | United States | |
| | RBE | Aur Rum Benin | RUM BENIN | Benin | |
| | RBJ | Aeroserivios Del Bajio | AEROBAJIO | Mexico | |
| 4Y | RBU | Airbus France | AIRBUS FRANCE | France | |
| | RBV | Air Roberval | AIR ROBERVAL | Canada | |
| AG | ARU | Aruba Airlines | ARUBA | Aruba | |
| | RCC | Air Charters Eelde | RACER | Netherlands | ICAO code and call sign no longer allocated |
| | RCE | Aerocer | AEROCER | Mexico | |
| | RCF | Aeroflot-Cargo | AEROFLOT-CARGO | Russia | |
| MC | RCH | Air Mobility Command | REACH | United States | United States Air Force |
| | RCI | Air Cassai | AIR CASSAI | Angola | |
| | RCO | Aero Renta De Coahuila | AEROCOAHUILA | Mexico | |
| | RCP | Aerocorp | AEROCORPSA | Mexico | |
| | RCQ | Aerolíneas Regionales | REGIONAL CARGO | Mexico | |
| | RCU | Atlantic S.L. | AIR COURIER | Spain | |
| | RCX | Air Service Center | SERVICE CENTER | Italy | |
| | RDM | Air Ada | AIR ADA | Mauritania | |
| RE | REA | Aer Arann | AER ARANN | Ireland | |
| | REN | Aero-Rent | AERORENT | Mexico | |
| | RES | Australian Maritime Safety Authority | RESCUE | Australia | |
| UU | REU | Air Austral | REUNION | France | |
| | REY | Aero-Rey | AEROREY | Mexico | |
| | RFC | Aero Africa | AERO AFRICA | Swaziland | |
| ZP | AZP | Amaszonas Paraguay | GUARANI | Paraguay | |
| | RFD | Aerotransportes Rafilher | RAFHILER | Mexico | |
| | RGO | Argo | ARGOS | Dominican Republic | |
| | RGR | Avior Regional | AVIOR REGIONAL | Venezuela | 2014 |
| | RGT | Airbourne School of Flying | AIRGOAT | United Kingdom | ICAO code no longer allocated |
| | RHL | Air Archipels | ARCHIPELS | France | |
| | RIF | Aviation Ministry of the Interior of the Russian Federation | INTERMIN AVIA | Russian Federation | |
| | RIS | Aeris Gestión | AERIS | Spain | |
| 6K | RIT | Asian Spirit | ASIAN SPIRIT | Philippines | |
| | RJS | Aeroservicios Jet | ASERJET | Mexico | |
| | RKA | Air Afrique | AIRAFRIC | Ivory Coast | |
| A5 | RLA | Airlinair | AIRLINAIR | France | |
| NZ | RLK | Air Nelson | NELSON | New Zealand | defunct |
| | RLL | Air Leone | AEROLEONE | Sierra Leone | |
| QL | RLN | Aero Lanka | AERO LANKA | Sri Lanka | |
| | RLZ | Air Alize | ALIZE | France | |
| | RMD | Air Amder | AIR AMDER | Mauritania | |
| R3 | RME | Armenian Airlines | ARMENIAN | Armenia | defunct |
| MV | RML | Air Mediterranean | HELLASMED | Greece | |
| | RMO | Arm-Aero | ARM-AERO | Armenia | |
| | RMX | Air Max | AEROMAX | Bulgaria | |
| 2O | RNE | Air Salone | AIR SALONE | Sierra Leone | |
| | RNM | Aeronem Air Cargo | AEROMNEM | Ecuador | |
| | RNR | Air Cargo Masters | RUNNER | United States | |
| U8 | RNV | Armavia | ARMAVIA | Armenia | defunct, ICAO code no longer allocated |
| | ROE | Aeroeste | ESTE-BOLIVIA | Bolivia | |
| | ROH | Aero Gen | AEROGEN | Mexico | |
| | ROI | Avior Airlines | AVIOR | Venezuela | |
| | ROL | Aeroel Airways | AEROEL | Israel | ICAO code no longer allocated |
| BQ | ROM | Aeromar Lineas Aereas Dominicanas | BRAVO QUEBEC | Dominican Republic | defunct |
| | ROO | Aeroitalia | AEROITALIA | Italy | defunct |
| | ROD | Aerodan | AERODAN | Mexico | |
| P5 | RPB | AeroRepública | AEROREPUBLICA | Colombia | |
| | RPC | Aerolíneas Del Pacífico | AEROPACSA | Ecuador | |
| | RRC | Aero Roca | AEROROCA | Mexico | |
| | RRE | Aerotransportes Internacionales De Torreon | AERO TORREON | Mexico | |
| | RSC | Aerolíneas Ejecutivas Tarascas | TARASCAS | Mexico | |
| E4 | RSO | Aero Asia International | AERO ASIA | Pakistan | defunct |
| BF | RSR | Aero-Service | CONGOSERV | Republic of the Congo | |
| 5L | RSU | AeroSur | AEROSUR | Bolivia | |
| | RTE | Aeronorte | LUZAVIA | Portugal | ICAO code no longer allocated |
| | RTH | Artis | ARTHELICO | France | |
| | RTO | Arhabaev Tourism Airlines | ARTOAIR | Kazakhstan | |
| | RTQ | Air Turquoise | TURQUOISE | France | |
| | RTU | Aerotucan | AEROTUCAN | Mexico | |
| | RUD | Air Anastasia | ANASTASIA | Ukraine | |
| | RUM | Air Rum | AIR RUM | Sierra Leone | |
| | RVP | Air VIP | AEROVIP | Portugal | |
| | RVT | Aircompany Veteran | AIR-VET | Armenia | |
| | RWB | Alliance Express Rwanda | | Rwanda | Formerly Air Rwanda, revived as RwandAir after the Rwandan Genocide |
| | RWC | Arrow Ecuador Arrowec | ARROWEC | Ecuador | |
| | RWY | Aerogroup 98 Limited | TYNWALD | United Kingdom | ICAO code no longer allocated |
| | RXT | Aeroxtra | AERO-EXTRA | Mexico | |
| | RWS | Air Whitsunday | | Australia | |
| | RZL | Aero Zambia | AERO ZAMBIA | Zambia | |
| | RZN | Aero Zano | ZANO | Mexico | |
| | RZZ | Anoka Air Charter | RED ZONE | United States | |
| | SBH | Aerosaab | AEROSAAB | Mexico | |
| | SCD | Associated Aviation | ASSOCIATED | Nigeria | |
| | SCM | American Jet International | SCREAMER | United States | |
| EX | SDO | Air Santo Domingo | AERO DOMINGO | Dominican Republic | |
| | SDP | Aero Sudpacifico | SUDPACIFICO | Mexico | |
| | SEF | Aero Servicios Ejecutivas Del Pacifico | SERVIPACIFICO | Mexico | |
| JR | SER | Aero California | AEROCALIFORNIA | Mexico | |
| | SGV | Aerosegovia | SEGOVIA | Nicaragua | |
| | SHH | Airshare Holdings | AIRSHARE | United Kingdom | ICAO code no longer allocated |
| | SIY | Aerosiyusa | SIYUSA | Mexico | |
| | SIZ | Aero Silza | AEROSILZA | Mexico | |
| | SJN | Air San Juan | SAN JUAN | United States | |
| | SKP | Aero-North Aviation Services | SKIPPER | Canada | defunct |
| | SMI | Aero Sami | SAMI | Mexico | |
| Z3 | SMJ | Avient Aviation | AVAVIA | Zimbabwe | |
| | SOD | Aerolíneas Sol | ALSOL | Mexico | |
| | SOE | Air Soleil | AIR SOLEIL | Mauritania | |
| | SOG | Aero Soga | AEROSOGA | Guinea-Bissau | defunct |
| | SPD | Airspeed Aviation | SPEEDLINE | Canada | ICAO code no longer allocated |
| M3 | SPJ | Air Service | AIR SKOPJE | Macedonia | |
| | SPO | Aeroservicios Ejecutivos Del Pacifico | EJECTUIV PACIFICO | Mexico | |
| | SPY | Asian Aerospace Service | THAI SPACE | Thailand | |
| | SPZ | Airworld | SPEED SERVICE | South Africa | |
| | SQR | Alsaqer Aviation | ALSAQER AVIATION | Libya | ICAO code no longer allocated |
| | SRI | Air Safaris and Services | AIRSAFARI | New Zealand | |
| | SRV | Aero Servicio Corporativo | SERVICORP | Mexico | |
| | SSL | Air Sultan | SIERRA SULTAN | Sierra Leone | |
| | SSM | Aero 1 Pro-Jet | RAPID | Canada | defunct |
| | SSN | Airquarius Air Charter | SUNSTREAM | South Africa | ICAO code no longer allocated |
| | STK | Aeropac | SAT PAK | United States | |
| | STT | Air St. Thomas | PARADISE | United States | |
| | SUE | Aerolíneas Del Sureste | AEROSURESTE | Mexico | |
| 8D* | SUW | Astair | | Russian Federation | Name changed to Interavia Airlines |
| | SUY | Aerial Surveys (1980) Limited | SURVEY | New Zealand | |
| GM | SVK | Air Slovakia | SLOVAKIA | Slovakia | ICAO code no longer allocated |
| R3 | SYL | Aircompany Yakutia | AIR YAKUTIA | Russia | |
| | SYT | Aerosud Aviation | SKYTRACK | South Africa | |
| HC | SZN | Air Senegal | AIR SENEGAL | Senegal | |
| | TAA | Aeroservicios de La Costa | AERO COSTA | Mexico | |
| VW | TAO | Aeromar | TRANS-AEROMAR | Mexico | |
| | TBL | Aerotrebol | AEROTREBOL | Mexico | |
| | TBO | Aero Taxi de Los Cabos | AERO CABOS | Mexico | |
| JY | TCI | Air Turks and Caicos | KERRMONT | Turks and Caicos Islands | ICAO code no longer allocated |
| | TCO | Aerotranscolombina de Carga | TRANSCOLOMBIA | Colombia | |
| | TDG | Air Cargo Express | TURBO DOG | United States | |
| | TDT | Atlas Helicopters | TRIDENT | United Kingdom | |
| | TDY | Air Today | AIR TODAY | United States | |
| | TED | Aero Servicios Azteca | AEROAZTECA | Mexico | |
| | TIR | Antair | ANTAIR | Mexico | |
| | TLD | Aereo Taxi Autlan | AEREO AUTLAN | Mexico | |
| | TLE | Aero Util | AEROUTIL | Mexico | |
| | TLU | Aero Toluca Internactional | AEROTOLUCA | Mexico | |
| | TME | Aero Taxi del Centro de Mexico | TAXICENTRO | Mexico | |
| | TOC | Aerotropical | TROPICMEX | Mexico | |
| | TOH | Air Tomisko | TOMISKO CARGO | Serbia | |
| CG | TOK | Airlines PNG | BALUS | Papua New Guinea | |
| | TON | Aero Tonala | AEROTONALA | Mexico | |
| | TPB | Aero Tropical | AERO TROPICAL | Angola | |
| TY | TPC | Air Calédonie | AIRCAL | France | |
| | TPK | Air Horizon | TCHAD-HORIZON | Chad | |
| | TPO | Aero Taxi del Potosi | TAXI-POTOSI | Mexico | |
| | TQS | Aeroturquesa | AEROTURQUESA | Mexico | |
| | TRH | Airmark Aviation | TRANSTAR | United States | |
| FL | TRS | AirTran Airways | CITRUS | United States | defunct, last flight 12/30/2014, now part of Southwest Airlines |
| TS | TSC | Air Transat | AIR TRANSAT | Canada | |
| | TSQ | airtransse | AIRTRA | Japan | |
| | TTB | Aerolíneas Turísticas del Caribe | AERO TURISTICAS | Mexico | |
| | TTE | Avcenter | TETON | United States | |
| | TUN | Air Tungaru | TUNGARU | Kiribati | defunct |
| EC | TWN | Avialeasing Aviation Company | TWINARROW | Uzbekistan | |
| | TXD | Aerotaxis del Noroeste | TAXI OESTE | Mexico | |
| | TXF | Aerotaxis Alfe | ALFE | Mexico | |
| | TXI | Aereotaxis | AEREOTAXIS | Mexico | |
| | TZA | Aero Tomza | AERO TOMZA | Mexico | |
| | TZT | Air Zambezi | ZAMBEZI | Zimbabwe | |
| | UAG | Afra Airlines | AFRALINE | Ghana | |
| | UAR | Aerostar Airlines | AEROSTAR | Ukraine | |
| | UCK | Air Division of the Eastern Kazakhstan Region | GALETA | Kazakhstan | |
| U7 | UGA | Air Uganda | UGANDA | Uganda | |
| | UED | Air LA | AIR L-A | United States | |
| 6U | UKR | Air Ukraine | AIR UKRAINE | Ukraine | |
| | UMB | Air Umbria | AIR UMBRIA | Italy | |
| | UND | Atuneros Unidos de California | ATUNEROS UNIDOS | Mexico | |
| | USC | AirNet Express | STAR CHECK | United States | Renamed from US Check Airlines |
| | VNR | Avantair | AVANTAIR | United States | defunct |
| | VTG | Aviação Transportes Aéreos e Cargas | ATACARGO | Angola | |
| | WAS | Air-Watania | | Iraq | |
| | AAJ | Alfa Airlines | ALFA SUDAN | Sudan | |
| KO | AER | Alaska Central Express | ACE AIR | United States | |
| | AAK | Alaska Island Air | ALASKA ISLAND | United States | |
| KH | AAH | Aloha Air Cargo | ALOHA | United States | |
| AQ | AAH | Aloha Airlines | ALOHA | United States | defunct; former IATA code: TS |
| AA | AAL | American Airlines | AMERICAN | United States | |
| | XFS | American Flight Service Systems | | United States | |
| | XMG | AMS Group | | Russia | |
| WD* | AAN | Amsterdam Airlines | AMSTEL | Netherlands | Former IATA code: FH*. ICAO code and call sign no longer allocated |
| | ABI | Antigua and Barbuda Airways | Anair | Antigua and Barbuda | defunct |
| HO | DJA | Antinea Airlines | ANTINEA | Algeria | defunct |
| | EDY | Apollo Air Service | STOBART | United Kingdom | Was VLL Limited |
| | SRY | As-Aero | | Armenia | |
| OZ | AAR | Asiana Airlines | ASIANA | South Korea | |
| | XXX | ASL (Air Service Liege) | | Belgium | |
| AG | ABR | ASL Airlines Ireland | CONTRACT | Ireland | Former IATA Code: AG; former names: Hunting Air Cargo Airlines, Air Contractors |
| | XJA | Assistance Aeroportuaire de L'Aeroport de Paris | | France | |
| | AAE | Astec Air East | AIR EAST | United States | defunct |
| 8V | ACP | Astral Aviation | ASTRAL CARGO | Kenya | |
| | AAP | Astro Air International | ASTRO AIR | Philippines | defunct |
| | ATT | Attawasol Airlines | ATTAWASOL AIR | Libya | |
| XM | XME | Australian airExpress | AUS-CARGO | Australia | |
| AO | AUZ | Australian Airlines | AUSTRALIAN | Australia | Subsidiary merged with Qantas |
| | VAI | Avalair | AIR AVALAIR | Serbia | |
| XP | VXP | Avelo Airlines | AVELO | United States | Former ICAO code: CXP; former names: Casino Express Airlines, Xtra Airways |
| VE | AVE | Avensa | AVENSA | Venezuela | defunct |
| | VRT | Averitt Air Charter | AVERITT | United States | |
| | VSC | AVESCA | AVESCA | Colombia | defunct |
| | AJF | Avia Consult Flugbetriebs | AVIACONSULT | Austria | |
| | VTT | Avia Trans Air Transport | VIATRANSPORT | Sudan | |
| 6A | CHP | Aviacsa | AVIACSA | Mexico | |
| AV | AVA | Avianca | AVIANCA | Colombia | |
| A0 | MCJ | Avianca Argentina | JETMAC | Argentina | Owned by Synergy Group |
| O6 | ONE | Avianca Brasil | OCEAN AIR | Brazil | Owned by Synergy Group |
| 2K | GLG | Avianca Ecuador | GALAPAGOS | Ecuador | Aerolíneas Galápagos SA |
| | XAV | Aviaprom Enterprises | AVIAPROM | Russia | |
| | AVB | Aviation Beauport | BEAUPAIR | United Kingdom | |
| | AVQ | Aviation Services, Inc. | AQUILINE | United States | |
| | ACJ | Avicon | AVICHARTER | Kenya | |
| | VSR | Aviostart AS | AVIOSTART | Bulgaria | |
| V5 | VLI | Avolar Aerolíneas | AEROVOLAR | Mexico | defunct |
| | VSA | Avstar Aviation | STARBIRD | South Africa | |
| AD | AZU | Azul Linhas Aéreas Brasileiras | Azul | Brazil | |