| Abbreviation | Definition |
|---|---|
| ABV | Abuja, Nigeria |
| ABX | Albury, New South Wales, Australia |
| ABY | Albany, Georgia USA |
| ABZ | Aberdeen, Scotland, UK |
| ACA | Acapulco, Mexico |
| ACC | Accra, Ghana |
| ACE | Lanzarote, Canary Islands |
| ACH | Altenrhein, Switzerland |
| ACI | Alderney, Channel Islands, United Kingdom |
| ACK | Nantucket, Massachusetts USA |
| ACT | Waco, Texas USA |
| ACV | Eureka/ Arcata, California USA |
| ACY | Atlantic City International Airport, Atlantic City, New Jersey USA |
| ADA | Adana, Turkey |
| ADB | Izmir Adnan Airport, Menderes, Turkey |
| ADD | Addis Ababa, Ethiopia |
| ADE | Aden, Republic of Yemen |
| ADH | Aldan, Russia |
| ADJ | Amman Civil Airport, Marka, Jordan |
| ADK | Adak Island, Alaska USA |