| Sierning to Novi di Modena | 271.46 mi (436.88 km) |
| Sierning to Novi Ligure | 347.43 mi (559.13 km) |
| Sierning to Nuoro | 587.83 mi (946.02 km) |
| Sierning to Occhiobello | 251.79 mi (405.22 km) |
| Sierning to Oderzo | 178.38 mi (287.07 km) |
| Sierning to Oggiono | 281.36 mi (452.81 km) |
| Sierning to Olbia | 546.33 mi (879.24 km) |
| Sierning to Oleggio | 316.99 mi (510.14 km) |
| Sierning to Olgiate Comasco | 296.57 mi (477.28 km) |
| Sierning to Olgiate Olona | 305.74 mi (492.03 km) |
| Sierning to Omegna | 315.94 mi (508.46 km) |
| Sierning to Opera | 303.26 mi (488.05 km) |
| Sierning to Oppeano | 240.66 mi (387.30 km) |
| Sierning to Orbassano | 384.12 mi (618.17 km) |
| Sierning to Orbetello | 415.48 mi (668.65 km) |
