| Abbreviation | Definition |
|---|---|
| OWK | Norridgewock, Maine USA |
| OWX | Ottawa, Ohio USA |
| OXB | Bissau, Guinea Bissau |
| OXC | Waterbury- Oxford Airport, Oxford, Connecticut USA |
| OXD | Miami University Airport, Oxford, Ohio USA |
| OXF | London Oxford Airport (Kidlington), Oxford, England, United Kingdom |
| OXI | Starke County Airport, Knox, Indiana USA |
| OXO | Orientos, Queensland, Australia |
| OXR | Oxnard Airport, Oxnard, California USA |
| OXV | Knoxville, Iowa USA |
| OXY | Morney, Queensland, Australia |
| OYA | Goya, CR, Argentina |
| OYE | Oyem, Gabon |
| OYG | Moyo, Uganda |
| OYK | Oiapoque, AP, Brazil |
| OYL | Moyale, Kenya |
| OYM | St. Marys, Pennsylvania USA |
| OYN | Ouyen, Victoria, Australia |
| OYP | St.- Georges de l'Oyapock, French Guinea |
| OYS | Pine Mountain Lake Airport, Yosemite National Park, California USA |