| Mentana to Novi di Modena | 217.24 mi (349.62 km) |
| Mentana to Novi Ligure | 271.15 mi (436.38 km) |
| Mentana to Nuoro | 208.68 mi (335.83 km) |
| Mentana to Occhiobello | 207.74 mi (334.32 km) |
| Mentana to Oderzo | 260.19 mi (418.74 km) |
| Mentana to Oggiono | 307.70 mi (495.20 km) |
| Mentana to Olbia | 179.91 mi (289.54 km) |
| Mentana to Oleggio | 318.36 mi (512.35 km) |
| Mentana to Olgiate Comasco | 318.28 mi (512.22 km) |
| Mentana to Olgiate Olona | 312.48 mi (502.89 km) |
| Mentana to Omegna | 340.09 mi (547.32 km) |
| Mentana to Opera | 288.94 mi (465.00 km) |
| Mentana to Oppeano | 238.40 mi (383.66 km) |
| Mentana to Orbassano | 329.03 mi (529.53 km) |
| Mentana to Orbetello | 79.13 mi (127.35 km) |
