| Abbreviation | Definition |
|---|---|
| OHI | Oshakati, Namibia |
| OHO | Ohotsk, Russia |
| OHR | Wyk Auf Foehr, Germany |
| OHT | Kohat, Pakistan |
| OHX | Old Hickory Airport, Nashville, Tennessee USA |
| OI47 | WBNS-TV Channel 10 Heliport, Columbus, Ohio USA |
| OI50 | First District Police Station Heliport, Cleveland, Ohhio USA |
| OI59 | Miller Airport, Chester, Ohio USA |
| OIA | Orlando International Airport, Orlando, Florida USA |
| OIAA | Abadan International, Iran |
| OIAB | Boostan, Iran |
| OIAD | Dezful, Iran |
| OIAG | Aghajari, Iran |
| OIAH | Gachsaran, Iran |
| OIAI | Masjed Soleiman, Iran |
| OIAJ | Omidyeh, Iran |
| OIAK | Haft-Gel, Iran |
| OIAL | Lali, Iran |
| OIAM | Bandar Mahshahr, Iran |
| OIAN | ndimeshk, Iran |