| Abbreviation | Definition |
|---|---|
| OLKA | Kleiat, Lebanon |
| OLM | Olympia, Washington USA |
| OLN | Colonia Sarmiento, Cb, Argentina |
| OLP | Olympic Dam, South Australia, Australia |
| OLQ | Olsobip, Papua New Guinea |
| OLS | Nogales, Arizona |
| OLU | Columbus, Nebraska |
| OLV | Olive Branch, Mississippi |
| OLY | Olney, Illinois USA |
| OLZ | Oelwein, Iowa USA |
| OMA | Omaha, Nebraska USA |
| OMAA | Abu Dhabi Nadia International, United Arab Emirat |
| OMAB | Buhasa, United Arab Emirat |
| OMAC | Asab, United Arab Emirat |
| OMAD | Abu Dhabi-Bettina, United Arab Emirat |
| OMAH | Al Hamra Air Force Base, United Arab Emirat |
| OMAJ | Jebel Dhana, United Arab Emirat |
| OMAL | Al Ain, United Arab Emirat |
| OMAM | Abu Dhabi Dhafra Air Force bas, United Arab Emirat |
| OMAM | Abu Dhabi Dhafra Air Force Base, United Arab Emirates |