| Abbreviation | Definition |
|---|---|
| AS20 | Alaska Airlines 20 |
| ASA | Assab, Eritrea |
| ASB | Ashkhabat, Turkmenistan |
| ASE | Aspen, Colorado USA |
| ASF | Astrakhan, Russia |
| ASJ | Amami O Shima, Japan |
| ASK | Andros Town, Bahamas |
| ASM | Asmara, Eritrea |
| ASO | Asosa, Ethiopia |
| ASP | Alice Springs, Northern Territory, Australia |
| ASR | Kayseri, Turkey |
| AST | Astoria Regional Airport, Astoria, Oregon USA |
| ASU | Asuncion, Paraguay |
| ASV | Amboseli, Kenya |
| ASW | Aswan, Egypt |
| ASW | Warsaw Municipal Airport, Warsaw, Indiana USA |
| ATC | Arthur's Town, Bahamas |
| ATH | Athens, Greece |
| ATK | Atqasuk, Alaska USA |
| ATL | Hartsfeld-Jackson International Airport, Atlanta, Georgia USA |