| Walton upon Thames to Noventa Vicentina | 690.63 mi (1,111.46 km) |
| Walton upon Thames to Novi di Modena | 686.70 mi (1,105.13 km) |
| Walton upon Thames to Novi Ligure | 623.61 mi (1,003.60 km) |
| Walton upon Thames to Nuoro | 895.48 mi (1,441.14 km) |
| Walton upon Thames to Occhiobello | 709.26 mi (1,141.45 km) |
| Walton upon Thames to Oderzo | 704.15 mi (1,133.23 km) |
| Walton upon Thames to Oggiono | 589.90 mi (949.35 km) |
| Walton upon Thames to Olbia | 863.43 mi (1,389.56 km) |
| Walton upon Thames to Oleggio | 574.93 mi (925.26 km) |
| Walton upon Thames to Olgiate Comasco | 576.85 mi (928.35 km) |
| Walton upon Thames to Olgiate Olona | 581.51 mi (935.85 km) |
| Walton upon Thames to Omegna | 553.43 mi (890.67 km) |
| Walton upon Thames to Opera | 605.15 mi (973.90 km) |
| Walton upon Thames to Oppeano | 677.25 mi (1,089.93 km) |
| Walton upon Thames to Orbassano | 572.34 mi (921.10 km) |
