Sân bay quốc tế
| Airline Name | ICAO | IATA | Callsign | Country |
| ATA Airlines | AMT | TZ | AMTRAN | United States |
| ATA Brasil | ABZ | ATA BRASIL | Brazil | |
| Athens Airways | 8D | Greece | ||
| ATI - Aero Transporti Italiani | ATI | BM | Italy | |
| Atlant-Soyuz Airlines | AYZ | 3G | Russian Federation | |
| Atlanta Jet Inc | United States | |||
| Atlantic Airlines | NPT | NEPTUNE | United Kingdom | |
| Atlantic Airlines de Honduras | HHA | ZF | Honduras | |
| Atlantic Airways | FLI | RC | FAROELINE | Faroe Islands |
| Atlantic Coast Airlines | BLR | DH | BLUE RIDGE | United States |
| Atlantic Coast Jet | United States | |||
| Atlantic Express | AAG | 7M | ATLANTIC | United Kingdom |
| Atlantic Express | United States | |||
| Atlantic Express Airlines | Gambia | |||
| Atlantic Southeast Airlines (ASA) | ASQ | EV | ACEY | United States |
| Atlantico Linhas Aereas (ALA) | TLN | Brazil | ||
| Atlantique Air Assistance | TLB | TRIPLE ALPHA | France | |
| Atlas Air | GTI | 5Y | United States | |
| Atlas Blue | BMM | 8A | Morocco | |
| Atlas International | OGE | 2U | Turkey | |
| Atlasjet | KKK | KK | Turkey | |
| ATR | France | |||
| Audeli Air Express | ADI | Spain | ||
| Augsburg Airways | AUB | IQ | AUGSBURG-AIR | Germany |
| Aurela | LSK | Lithuania | ||
| Aurigny Air Services | AUR | GR | United Kingdom | |
| Aurora Airlines | URR | AIR AURORA | Slovenia | |
| Austral Lineas Aereas | AUT | AU | Argentina | |
| Australia Asia Airlines | AAU | IM | Australia | |
| Australian Air Express | XME | XM | JETX | Australia |
| Australian Airlines | AUZ | AO | Australia | |
| Australian Airlines | AUS | TN | Australia | |
| Australian Regional Airlines | TN | Australia | ||
| Austrian Air Services | AAS | SO | Austria | |
| Austrian Airlines | AUA | OS | AUSTRIAN | Austria |
| Austrian Arrows | TYR | VO | AUSTRIAN | Austria |
| Austrojet (BFS Business Flight Salzburg) | AUJ | AUSTROJET | Austria | |
| AV8 Air | United Kingdom | |||
| Avant Airlines | VAT | OT | Chile | |
| Avanti Air | EEX | Germany | ||
| AVE.com | PHW | P3 | PHOENIX SHARJAH | United Arab Emirates |
| AVENSA | AVE | VE | Venezuela | |
| Avia Airlines | AGW | South Africa | ||
| Aviacion Del Noroeste | ANW | OC | AVINOR | Mexico |
| Aviaco | AYC | AO | AVIACO | Spain |
| AVIACSA | CHP | 6A | Mexico | |
| Aviajet | Ireland | |||
| Avianca | AVA | AV | AVIANCA | Colombia |
| Avianova | AO | Russian Federation | ||
| Avianova | NOV | RD | Italy | |
| Aviaprad | VID | WR | AVIAPRAD | Russian Federation |
| Aviastar | Indonesia | |||
| Aviastar | FUE | Russian Federation | ||
| Aviateca | GUG | GU | AVIATECA | Guetemala |
| Aviation Partners Inc | United States | |||
| Aviavilsa | LVR | Lithuania | ||
| Avient Aviation | SMJ | Z3 | AVAVIA | Zimbabwe |
| Aviogenex | AGX | JJ | Genex | Serbia |
| Avioimpex | AXX | M4 | Macedonia, The Former Yugoslav Republic Of | |
| Avione | Switzerland | |||
| Avior Airlines | ROI | 3B | Venezuela | |
| Aviosarda | ADZ | Italy | ||
| Avirex | VXG | G2 | Gabon | |
| Avolar | VLI | V5 | AVOLAR | Mexico |
| Awair Air Wagon Int'l | AWQ | QZ | Indonesia | |
| Axis Airways | AXY | 6V | Axis | France |
| Axon Airlines | AXO | XN | Greece | |
| Azal Azerbaijan Airlines | AHY | J2 | AZAL | Azerbaijan |
| Azmar Air | Irag | |||
| Azul - Linhas Aereas Brasileiras | AZU | AD | AZUL | Brazil |
| Azzurra Air | AZI | ZS | Italy |