| Drobeta-Turnu Severin to Octeville | 1,186.94 mi (1,910.19 km) |
| Drobeta-Turnu Severin to Oignies | 997.49 mi (1,605.31 km) |
| Drobeta-Turnu Severin to Oissel | 1,062.64 mi (1,710.15 km) |
| Drobeta-Turnu Severin to Olivet | 1,012.91 mi (1,630.11 km) |
| Drobeta-Turnu Severin to Ollioules | 841.56 mi (1,354.35 km) |
| Drobeta-Turnu Severin to Olonne-sur-Mer | 1,183.47 mi (1,904.62 km) |
| Drobeta-Turnu Severin to Oloron-Sainte-Marie | 1,157.88 mi (1,863.43 km) |
| Drobeta-Turnu Severin to Onet Village | 986.08 mi (1,586.95 km) |
| Drobeta-Turnu Severin to Onnaing | 970.38 mi (1,561.68 km) |
| Drobeta-Turnu Severin to Orange | 879.81 mi (1,415.92 km) |
| Drobeta-Turnu Severin to Orchies | 987.03 mi (1,588.47 km) |
| Drobeta-Turnu Severin to Orleans | 1,012.75 mi (1,629.87 km) |
| Drobeta-Turnu Severin to Orly | 997.81 mi (1,605.82 km) |
| Drobeta-Turnu Severin to Ormesson-sur-Marne | 991.72 mi (1,596.02 km) |
| Drobeta-Turnu Severin to Orsay | 1,006.58 mi (1,619.94 km) |
