| Roman to Octeville | 1,318.85 mi (2,122.49 km) |
| Roman to Oignies | 1,113.38 mi (1,791.81 km) |
| Roman to Oissel | 1,197.03 mi (1,926.43 km) |
| Roman to Olivet | 1,167.28 mi (1,878.55 km) |
| Roman to Ollioules | 1,058.65 mi (1,703.73 km) |
| Roman to Olonne-sur-Mer | 1,351.91 mi (2,175.69 km) |
| Roman to Oloron-Sainte-Marie | 1,361.08 mi (2,190.44 km) |
| Roman to Onet Village | 1,183.84 mi (1,905.21 km) |
| Roman to Onnaing | 1,086.47 mi (1,748.51 km) |
| Roman to Orange | 1,084.05 mi (1,744.61 km) |
| Roman to Orchies | 1,102.40 mi (1,774.14 km) |
| Roman to Orleans | 1,166.61 mi (1,877.47 km) |
| Roman to Orly | 1,139.87 mi (1,834.45 km) |
| Roman to Ormesson-sur-Marne | 1,133.11 mi (1,823.57 km) |
| Roman to Orsay | 1,149.39 mi (1,849.76 km) |
