| Os to Octeville | 783.96 mi (1,261.66 km) |
| Os to Oignies | 681.08 mi (1,096.10 km) |
| Os to Oissel | 771.68 mi (1,241.89 km) |
| Os to Olivet | 866.11 mi (1,393.86 km) |
| Os to Ollioules | 1,180.73 mi (1,900.21 km) |
| Os to Olonne-sur-Mer | 990.57 mi (1,594.17 km) |
| Os to Oloron-Sainte-Marie | 1,204.08 mi (1,937.79 km) |
| Os to Onet Village | 1,102.40 mi (1,774.13 km) |
| Os to Onnaing | 683.74 mi (1,100.38 km) |
| Os to Orange | 1,111.96 mi (1,789.52 km) |
| Os to Orchies | 679.39 mi (1,093.37 km) |
| Os to Orleans | 863.41 mi (1,389.53 km) |
| Os to Orly | 802.77 mi (1,291.93 km) |
| Os to Ormesson-sur-Marne | 799.04 mi (1,285.93 km) |
| Os to Orsay | 807.18 mi (1,299.03 km) |
