| Abbreviation | Definition |
|---|---|
| OASS | Salang-i-Junubi, Afghanistan |
| OAST | Shur Tepa, Afghanistan |
| OATD | Toorghondi, Afghanistan |
| OATG | Tashkurghan, Afghanistan |
| OATK | Kotal, Afghanistan |
| OATN | Tereen, Afghanistan |
| OATQ | Taluqan, Afghanistan |
| OATW | Tewara, Afghanistan |
| OATZ | Tesaak, Afghanistan |
| OAUZ | Kunduz, Afghanistan |
| OAWU | Wutach, Afghanistan |
| OAWZ | Wazirabad, Afghanistan |
| OAX | Oaxaca, Mexico |
| OAYQ | Yangi Qala, Afghanistan |
| OAZB | Zebak, Afghanistan |
| OAZJ | Zaranj, Afghanistan |
| OBA | Oban, Queensland, Australia |
| OBBI | Bahrain Muharraq International, Bahrain |
| OBBS | Bahrain Sheik Isa Air Base, Bahrain |
| OBC | Obock, Djibouti |