O
- Oak Ridge
- Ocala
- Ocean City
- Oceanside
- Odessa-Schlemeyer Field
- Offutt
- Ogallala, Searle Field Airport
- Ogden
- Ogden/Hill
- Oklahoma City Will Rogers Apt.
- Olathe
- Olathe
- Olympia Airport
- Omaha, Eppley Airfield
- O'Neil
- Ontario
- Orangeburg Municipal Airport
- Orange, Orange Municipal Airport
- Ord
- Orlando Executive Airport
- Orlando International Airport
- Ortonville
- Oshkosh
- Ottumwa Airport
- Owensboro
- Oxford
- Oxnard
- Ozark
