| Cities | Distance |
|---|---|
| Sierre to Orbetello | 322.67 mi (519.29 km) |
| Sierre to Oria | 645.41 mi (1,038.69 km) |
| Sierre to Oristano | 445.00 mi (716.16 km) |
| Sierre to Orta Nova | 532.54 mi (857.03 km) |
| Sierre to Orte | 357.37 mi (575.13 km) |
| Sierre to Ortona | 435.25 mi (700.46 km) |
| Sierre to Orvieto | 334.70 mi (538.65 km) |
| Sierre to Orzinuovi | 131.17 mi (211.10 km) |
| Sierre to Osimo | 350.13 mi (563.48 km) |
| Sierre to Ospitaletto | 132.46 mi (213.18 km) |
| Sierre to Ostuni | 632.81 mi (1,018.41 km) |
| Sierre to Ottaviano | 512.07 mi (824.09 km) |
| Sierre to Ovada | 126.79 mi (204.05 km) |
| Sierre to Ozieri | 401.68 mi (646.44 km) |
| Sierre to Paceco | 629.15 mi (1,012.52 km) |