| Thornton to Noventa Vicentina | 837.40 mi (1,347.66 km) |
| Thornton to Novi di Modena | 838.58 mi (1,349.56 km) |
| Thornton to Novi Ligure | 785.12 mi (1,263.53 km) |
| Thornton to Nuoro | 1,066.56 mi (1,716.47 km) |
| Thornton to Occhiobello | 858.01 mi (1,380.83 km) |
| Thornton to Oderzo | 843.16 mi (1,356.93 km) |
| Thornton to Oggiono | 743.70 mi (1,196.87 km) |
| Thornton to Olbia | 1,033.19 mi (1,662.77 km) |
| Thornton to Oleggio | 733.11 mi (1,179.83 km) |
| Thornton to Olgiate Comasco | 732.46 mi (1,178.78 km) |
| Thornton to Olgiate Olona | 738.36 mi (1,188.28 km) |
| Thornton to Omegna | 711.14 mi (1,144.47 km) |
| Thornton to Opera | 761.84 mi (1,226.07 km) |
| Thornton to Oppeano | 825.50 mi (1,328.52 km) |
| Thornton to Orbassano | 737.83 mi (1,187.42 km) |
