| Fort Thomas to Octeville | 3,945.03 mi (6,348.91 km) |
| Fort Thomas to Oignies | 4,107.81 mi (6,610.88 km) |
| Fort Thomas to Oissel | 4,064.96 mi (6,541.92 km) |
| Fort Thomas to Olivet | 4,142.80 mi (6,667.19 km) |
| Fort Thomas to Ollioules | 4,467.07 mi (7,189.06 km) |
| Fort Thomas to Olonne-sur-Mer | 4,027.55 mi (6,481.71 km) |
| Fort Thomas to Oloron-Sainte-Marie | 4,181.28 mi (6,729.13 km) |
| Fort Thomas to Onet Village | 4,284.08 mi (6,894.56 km) |
| Fort Thomas to Onnaing | 4,134.19 mi (6,653.34 km) |
| Fort Thomas to Orange | 4,387.46 mi (7,060.93 km) |
| Fort Thomas to Orchies | 4,117.56 mi (6,626.58 km) |
| Fort Thomas to Orleans | 4,141.96 mi (6,665.84 km) |
| Fort Thomas to Orly | 4,136.01 mi (6,656.26 km) |
| Fort Thomas to Ormesson-sur-Marne | 4,140.66 mi (6,663.75 km) |
| Fort Thomas to Orsay | 4,129.02 mi (6,645.01 km) |
