| River Falls to Octeville | 4,009.23 mi (6,452.24 km) |
| River Falls to Oignies | 4,146.13 mi (6,672.54 km) |
| River Falls to Oissel | 4,121.87 mi (6,633.50 km) |
| River Falls to Olivet | 4,211.28 mi (6,777.40 km) |
| River Falls to Ollioules | 4,562.78 mi (7,343.09 km) |
| River Falls to Olonne-sur-Mer | 4,123.96 mi (6,636.87 km) |
| River Falls to Oloron-Sainte-Marie | 4,305.49 mi (6,929.02 km) |
| River Falls to Onet Village | 4,383.24 mi (7,054.14 km) |
| River Falls to Onnaing | 4,171.02 mi (6,712.61 km) |
| River Falls to Orange | 4,478.88 mi (7,208.05 km) |
| River Falls to Orchies | 4,154.87 mi (6,686.62 km) |
| River Falls to Orleans | 4,210.03 mi (6,775.38 km) |
| River Falls to Orly | 4,193.84 mi (6,749.34 km) |
| River Falls to Ormesson-sur-Marne | 4,197.51 mi (6,755.23 km) |
| River Falls to Orsay | 4,188.12 mi (6,740.12 km) |
