| Nantes to Oria | 1,058.79 mi (1,703.95 km) |
| Nantes to Oristano | 715.26 mi (1,151.10 km) |
| Nantes to Orta Nova | 943.26 mi (1,518.03 km) |
| Nantes to Orte | 756.46 mi (1,217.40 km) |
| Nantes to Ortona | 849.56 mi (1,367.23 km) |
| Nantes to Orvieto | 735.38 mi (1,183.47 km) |
| Nantes to Orzinuovi | 561.85 mi (904.20 km) |
| Nantes to Osimo | 772.86 mi (1,243.80 km) |
| Nantes to Ospitaletto | 565.31 mi (909.78 km) |
| Nantes to Ostuni | 1,048.02 mi (1,686.62 km) |
| Nantes to Ottaviano | 907.28 mi (1,460.13 km) |
| Nantes to Ovada | 521.06 mi (838.56 km) |
| Nantes to Ozieri | 696.19 mi (1,120.41 km) |
| Nantes to Paceco | 957.31 mi (1,540.64 km) |
| Nantes to Pachino | 1,117.58 mi (1,798.58 km) |
