| Grumo Appula to Novi di Modena | 396.97 mi (638.87 km) |
| Grumo Appula to Novi Ligure | 476.52 mi (766.88 km) |
| Grumo Appula to Nuoro | 388.97 mi (625.99 km) |
| Grumo Appula to Occhiobello | 373.70 mi (601.41 km) |
| Grumo Appula to Oderzo | 390.97 mi (629.21 km) |
| Grumo Appula to Oggiono | 494.20 mi (795.34 km) |
| Grumo Appula to Olbia | 375.59 mi (604.46 km) |
| Grumo Appula to Oleggio | 514.12 mi (827.40 km) |
| Grumo Appula to Olgiate Comasco | 508.68 mi (818.64 km) |
| Grumo Appula to Olgiate Olona | 505.66 mi (813.78 km) |
| Grumo Appula to Omegna | 534.18 mi (859.68 km) |
| Grumo Appula to Opera | 482.43 mi (776.40 km) |
| Grumo Appula to Oppeano | 405.88 mi (653.20 km) |
| Grumo Appula to Orbassano | 538.34 mi (866.37 km) |
| Grumo Appula to Orbetello | 299.48 mi (481.97 km) |
