| Portishead to Noventa Vicentina | 781.43 mi (1,257.58 km) |
| Portishead to Novi di Modena | 774.83 mi (1,246.98 km) |
| Portishead to Novi Ligure | 705.35 mi (1,135.15 km) |
| Portishead to Nuoro | 963.56 mi (1,550.71 km) |
| Portishead to Occhiobello | 798.98 mi (1,285.83 km) |
| Portishead to Oderzo | 798.10 mi (1,284.42 km) |
| Portishead to Oggiono | 677.62 mi (1,090.53 km) |
| Portishead to Olbia | 933.88 mi (1,502.94 km) |
| Portishead to Oleggio | 659.83 mi (1,061.89 km) |
| Portishead to Olgiate Comasco | 663.53 mi (1,067.85 km) |
| Portishead to Olgiate Olona | 667.30 mi (1,073.92 km) |
| Portishead to Omegna | 638.89 mi (1,028.19 km) |
| Portishead to Opera | 690.85 mi (1,111.81 km) |
| Portishead to Oppeano | 767.41 mi (1,235.02 km) |
| Portishead to Orbassano | 650.66 mi (1,047.13 km) |
