| Mentana to Octeville | 863.69 mi (1,389.97 km) |
| Mentana to Oignies | 743.02 mi (1,195.77 km) |
| Mentana to Oissel | 751.80 mi (1,209.90 km) |
| Mentana to Olivet | 662.00 mi (1,065.38 km) |
| Mentana to Ollioules | 354.60 mi (570.67 km) |
| Mentana to Olonne-sur-Mer | 777.33 mi (1,250.99 km) |
| Mentana to Oloron-Sainte-Marie | 678.33 mi (1,091.67 km) |
| Mentana to Onet Village | 531.53 mi (855.42 km) |
| Mentana to Onnaing | 721.30 mi (1,160.83 km) |
| Mentana to Orange | 421.75 mi (678.74 km) |
| Mentana to Orchies | 736.00 mi (1,184.48 km) |
| Mentana to Orleans | 663.16 mi (1,067.25 km) |
| Mentana to Orly | 679.96 mi (1,094.29 km) |
| Mentana to Ormesson-sur-Marne | 676.70 mi (1,089.04 km) |
| Mentana to Orsay | 685.26 mi (1,102.82 km) |
