| Grenade to Novi di Modena | 480.83 mi (773.83 km) |
| Grenade to Novi Ligure | 376.81 mi (606.41 km) |
| Grenade to Nuoro | 476.31 mi (766.54 km) |
| Grenade to Occhiobello | 514.15 mi (827.45 km) |
| Grenade to Oderzo | 566.05 mi (910.98 km) |
| Grenade to Oggiono | 418.67 mi (673.78 km) |
| Grenade to Olbia | 462.92 mi (744.99 km) |
| Grenade to Oleggio | 381.90 mi (614.61 km) |
| Grenade to Olgiate Comasco | 401.01 mi (645.36 km) |
| Grenade to Olgiate Olona | 394.14 mi (634.30 km) |
| Grenade to Omegna | 377.61 mi (607.70 km) |
| Grenade to Opera | 405.36 mi (652.36 km) |
| Grenade to Oppeano | 498.07 mi (801.57 km) |
| Grenade to Orbassano | 319.80 mi (514.66 km) |
| Grenade to Orbetello | 508.45 mi (818.27 km) |
