| Ottaviano to Noventa Vicentina | 340.40 mi (547.82 km) |
| Ottaviano to Novi di Modena | 332.86 mi (535.68 km) |
| Ottaviano to Novi Ligure | 395.04 mi (635.76 km) |
| Ottaviano to Nuoro | 272.40 mi (438.38 km) |
| Ottaviano to Occhiobello | 317.18 mi (510.46 km) |
| Ottaviano to Oderzo | 354.96 mi (571.26 km) |
| Ottaviano to Oggiono | 427.15 mi (687.43 km) |
| Ottaviano to Olbia | 260.02 mi (418.46 km) |
| Ottaviano to Oleggio | 440.53 mi (708.97 km) |
| Ottaviano to Olgiate Comasco | 439.01 mi (706.52 km) |
| Ottaviano to Olgiate Olona | 433.95 mi (698.37 km) |
| Ottaviano to Omegna | 461.97 mi (743.47 km) |
| Ottaviano to Opera | 410.31 mi (660.32 km) |
| Ottaviano to Oppeano | 349.46 mi (562.40 km) |
| Ottaviano to Orbassano | 453.36 mi (729.61 km) |
