| Oklahoma City to Octeville | 4,640.59 mi (7,468.30 km) |
| Oklahoma City to Oignies | 4,790.18 mi (7,709.05 km) |
| Oklahoma City to Oissel | 4,757.20 mi (7,655.97 km) |
| Oklahoma City to Olivet | 4,841.23 mi (7,791.20 km) |
| Oklahoma City to Ollioules | 5,179.50 mi (8,335.60 km) |
| Oklahoma City to Olonne-sur-Mer | 4,738.84 mi (7,626.42 km) |
| Oklahoma City to Oloron-Sainte-Marie | 4,904.83 mi (7,893.57 km) |
| Oklahoma City to Onet Village | 4,997.46 mi (8,042.64 km) |
| Oklahoma City to Onnaing | 4,815.83 mi (7,750.33 km) |
| Oklahoma City to Orange | 5,097.69 mi (8,203.94 km) |
| Oklahoma City to Orchies | 4,799.41 mi (7,723.90 km) |
| Oklahoma City to Orleans | 4,840.18 mi (7,789.51 km) |
| Oklahoma City to Orly | 4,828.98 mi (7,771.49 km) |
| Oklahoma City to Ormesson-sur-Marne | 4,833.13 mi (7,778.17 km) |
| Oklahoma City to Orsay | 4,822.62 mi (7,761.26 km) |
