| Abbreviation | Definition |
|---|---|
| OUH | Oudtshoorn, South Africa |
| OUI | Ban Houei Sai, Laos |
| OUL | Oulu, Finland |
| OUM | Oum Hadjer, Chad |
| OUN | Norman, Oklahoma USA |
| OUR | Batouri, Republic Of Cameroon |
| OUS | Ourinhos, Sao Paulo, Brazil |
| OUT | Bousso, Chad |
| OUU | Ouanga, Gabon |
| OUZ | Zouerate, Mauritania |
| OVA | Bekily, Madagascar |
| OVB | Novosibirsk, Russia |
| OVD | Asturias, Spain |
| OVE | Oroville Municipal Airport, Oroville, California USA |
| OVL | Ovalle, Chile |
| OVO | North Vernon Airport, North Vernon, Indiana USA |
| OWA | Owatonna, Minnesota USA |
| OWB | Owensboro- Daviess County Regional Airport, Owensboro, Kentucky USA |
| OWD | Norwood, Massachusetts USA |
| OWE | Owendo, Gabon |