| Portchester to Noventa Vicentina | 697.76 mi (1,122.93 km) |
| Portchester to Novi di Modena | 690.98 mi (1,112.02 km) |
| Portchester to Novi Ligure | 621.91 mi (1,000.87 km) |
| Portchester to Nuoro | 883.79 mi (1,422.32 km) |
| Portchester to Occhiobello | 715.19 mi (1,150.99 km) |
| Portchester to Oderzo | 715.09 mi (1,150.82 km) |
| Portchester to Oggiono | 593.76 mi (955.57 km) |
| Portchester to Olbia | 853.29 mi (1,373.24 km) |
| Portchester to Oleggio | 576.04 mi (927.05 km) |
| Portchester to Olgiate Comasco | 579.67 mi (932.89 km) |
| Portchester to Olgiate Olona | 583.47 mi (939.01 km) |
| Portchester to Omegna | 555.07 mi (893.30 km) |
| Portchester to Opera | 607.02 mi (976.91 km) |
| Portchester to Oppeano | 683.67 mi (1,100.26 km) |
| Portchester to Orbassano | 567.76 mi (913.73 km) |
