| Mont-Saint-Martin to Novi di Modena | 400.88 mi (645.16 km) |
| Mont-Saint-Martin to Novi Ligure | 359.22 mi (578.11 km) |
| Mont-Saint-Martin to Nuoro | 660.39 mi (1,062.80 km) |
| Mont-Saint-Martin to Occhiobello | 419.20 mi (674.64 km) |
| Mont-Saint-Martin to Oderzo | 406.03 mi (653.45 km) |
| Mont-Saint-Martin to Oggiono | 308.14 mi (495.91 km) |
| Mont-Saint-Martin to Olbia | 622.55 mi (1,001.89 km) |
| Mont-Saint-Martin to Oleggio | 302.98 mi (487.60 km) |
| Mont-Saint-Martin to Olgiate Comasco | 298.92 mi (481.07 km) |
| Mont-Saint-Martin to Olgiate Olona | 306.21 mi (492.80 km) |
| Mont-Saint-Martin to Omegna | 280.95 mi (452.15 km) |
| Mont-Saint-Martin to Opera | 328.99 mi (529.45 km) |
| Mont-Saint-Martin to Oppeano | 386.67 mi (622.28 km) |
| Mont-Saint-Martin to Orbassano | 323.85 mi (521.19 km) |
| Mont-Saint-Martin to Orbetello | 555.31 mi (893.68 km) |
