| Ruislip to Noventa Vicentina | 698.53 mi (1,124.17 km) |
| Ruislip to Novi di Modena | 695.20 mi (1,118.82 km) |
| Ruislip to Novi Ligure | 633.30 mi (1,019.21 km) |
| Ruislip to Nuoro | 906.69 mi (1,459.17 km) |
| Ruislip to Occhiobello | 717.41 mi (1,154.56 km) |
| Ruislip to Oderzo | 711.18 mi (1,144.54 km) |
| Ruislip to Oggiono | 598.56 mi (963.29 km) |
| Ruislip to Olbia | 874.41 mi (1,407.23 km) |
| Ruislip to Oleggio | 584.14 mi (940.09 km) |
| Ruislip to Olgiate Comasco | 585.73 mi (942.63 km) |
| Ruislip to Olgiate Olona | 590.55 mi (950.40 km) |
| Ruislip to Omegna | 562.56 mi (905.36 km) |
| Ruislip to Opera | 614.19 mi (988.45 km) |
| Ruislip to Oppeano | 685.31 mi (1,102.90 km) |
| Ruislip to Orbassano | 582.58 mi (937.56 km) |
