| Ercolano to Novi di Modena | 332.36 mi (534.89 km) |
| Ercolano to Novi Ligure | 392.83 mi (632.20 km) |
| Ercolano to Nuoro | 265.41 mi (427.14 km) |
| Ercolano to Occhiobello | 317.38 mi (510.77 km) |
| Ercolano to Oderzo | 356.56 mi (573.83 km) |
| Ercolano to Oggiono | 426.16 mi (685.85 km) |
| Ercolano to Olbia | 253.54 mi (408.04 km) |
| Ercolano to Oleggio | 438.96 mi (706.44 km) |
| Ercolano to Olgiate Comasco | 437.78 mi (704.54 km) |
| Ercolano to Olgiate Olona | 432.55 mi (696.13 km) |
| Ercolano to Omegna | 460.48 mi (741.08 km) |
| Ercolano to Opera | 408.92 mi (658.10 km) |
| Ercolano to Oppeano | 349.55 mi (562.55 km) |
| Ercolano to Orbassano | 450.72 mi (725.36 km) |
| Ercolano to Orbetello | 197.70 mi (318.16 km) |
