| Sierre to Noventa Vicentina | 205.08 mi (330.05 km) |
| Sierre to Novi di Modena | 189.59 mi (305.11 km) |
| Sierre to Novi Ligure | 122.50 mi (197.15 km) |
| Sierre to Nuoro | 423.16 mi (681.02 km) |
| Sierre to Occhiobello | 217.56 mi (350.13 km) |
| Sierre to Oderzo | 240.51 mi (387.07 km) |
| Sierre to Oggiono | 94.16 mi (151.53 km) |
| Sierre to Olbia | 384.71 mi (619.13 km) |
| Sierre to Oleggio | 71.63 mi (115.28 km) |
| Sierre to Olgiate Comasco | 77.46 mi (124.66 km) |
| Sierre to Olgiate Olona | 79.53 mi (127.99 km) |
| Sierre to Omegna | 51.01 mi (82.09 km) |
| Sierre to Opera | 102.84 mi (165.51 km) |
| Sierre to Oppeano | 188.88 mi (303.98 km) |
| Sierre to Orbassano | 89.32 mi (143.74 km) |
