| Mont-Saint-Aignan to Oria | 1,014.77 mi (1,633.12 km) |
| Mont-Saint-Aignan to Oristano | 755.36 mi (1,215.63 km) |
| Mont-Saint-Aignan to Orta Nova | 902.36 mi (1,452.20 km) |
| Mont-Saint-Aignan to Orte | 725.63 mi (1,167.78 km) |
| Mont-Saint-Aignan to Ortona | 804.98 mi (1,295.50 km) |
| Mont-Saint-Aignan to Orvieto | 703.08 mi (1,131.50 km) |
| Mont-Saint-Aignan to Orzinuovi | 499.23 mi (803.43 km) |
| Mont-Saint-Aignan to Osimo | 718.70 mi (1,156.63 km) |
| Mont-Saint-Aignan to Ospitaletto | 498.26 mi (801.86 km) |
| Mont-Saint-Aignan to Ostuni | 1,001.90 mi (1,612.40 km) |
| Mont-Saint-Aignan to Ottaviano | 880.65 mi (1,417.26 km) |
| Mont-Saint-Aignan to Ovada | 487.10 mi (783.91 km) |
| Mont-Saint-Aignan to Ozieri | 724.14 mi (1,165.38 km) |
| Mont-Saint-Aignan to Paceco | 975.73 mi (1,570.28 km) |
| Mont-Saint-Aignan to Pachino | 1,125.53 mi (1,811.36 km) |
