| Mainvilliers to Oria | 965.16 mi (1,553.27 km) |
| Mainvilliers to Oristano | 687.46 mi (1,106.36 km) |
| Mainvilliers to Orta Nova | 851.42 mi (1,370.23 km) |
| Mainvilliers to Orte | 671.03 mi (1,079.92 km) |
| Mainvilliers to Ortona | 754.59 mi (1,214.39 km) |
| Mainvilliers to Orvieto | 648.71 mi (1,043.99 km) |
| Mainvilliers to Orzinuovi | 451.62 mi (726.82 km) |
| Mainvilliers to Osimo | 670.59 mi (1,079.21 km) |
| Mainvilliers to Ospitaletto | 452.10 mi (727.59 km) |
| Mainvilliers to Ostuni | 952.83 mi (1,533.44 km) |
| Mainvilliers to Ottaviano | 825.84 mi (1,329.06 km) |
| Mainvilliers to Ovada | 430.97 mi (693.58 km) |
| Mainvilliers to Ozieri | 657.75 mi (1,058.54 km) |
| Mainvilliers to Paceco | 911.80 mi (1,467.40 km) |
| Mainvilliers to Pachino | 1,063.91 mi (1,712.20 km) |
