| Bucharest to Octeville | 1,346.56 mi (2,167.08 km) |
| Bucharest to Oignies | 1,151.67 mi (1,853.43 km) |
| Bucharest to Oissel | 1,222.48 mi (1,967.39 km) |
| Bucharest to Olivet | 1,177.42 mi (1,894.87 km) |
| Bucharest to Ollioules | 1,011.77 mi (1,628.28 km) |
| Bucharest to Olonne-sur-Mer | 1,351.08 mi (2,174.35 km) |
| Bucharest to Oloron-Sainte-Marie | 1,328.55 mi (2,138.09 km) |
| Bucharest to Onet Village | 1,156.60 mi (1,861.37 km) |
| Bucharest to Onnaing | 1,124.48 mi (1,809.67 km) |
| Bucharest to Orange | 1,050.47 mi (1,690.57 km) |
| Bucharest to Orchies | 1,140.99 mi (1,836.25 km) |
| Bucharest to Orleans | 1,177.15 mi (1,894.45 km) |
| Bucharest to Orly | 1,159.38 mi (1,865.84 km) |
| Bucharest to Ormesson-sur-Marne | 1,153.10 mi (1,855.73 km) |
| Bucharest to Orsay | 1,168.37 mi (1,880.32 km) |
