| Nettuno to Novi di Modena | 252.91 mi (407.01 km) |
| Nettuno to Novi Ligure | 300.05 mi (482.88 km) |
| Nettuno to Nuoro | 191.36 mi (307.97 km) |
| Nettuno to Occhiobello | 244.89 mi (394.11 km) |
| Nettuno to Oderzo | 298.20 mi (479.91 km) |
| Nettuno to Oggiono | 341.20 mi (549.11 km) |
| Nettuno to Olbia | 168.97 mi (271.92 km) |
| Nettuno to Oleggio | 349.72 mi (562.82 km) |
| Nettuno to Olgiate Comasco | 350.90 mi (564.72 km) |
| Nettuno to Olgiate Olona | 344.54 mi (554.48 km) |
| Nettuno to Omegna | 371.66 mi (598.12 km) |
| Nettuno to Opera | 321.18 mi (516.88 km) |
| Nettuno to Oppeano | 275.12 mi (442.76 km) |
| Nettuno to Orbassano | 355.56 mi (572.21 km) |
| Nettuno to Orbetello | 100.50 mi (161.73 km) |
