| Siran to Noventa Vicentina | 1,436.15 mi (2,311.26 km) |
| Siran to Novi di Modena | 1,465.24 mi (2,358.08 km) |
| Siran to Novi Ligure | 1,568.55 mi (2,524.33 km) |
| Siran to Nuoro | 1,563.59 mi (2,516.35 km) |
| Siran to Occhiobello | 1,432.11 mi (2,304.76 km) |
| Siran to Oderzo | 1,393.19 mi (2,242.12 km) |
| Siran to Oggiono | 1,544.01 mi (2,484.85 km) |
| Siran to Olbia | 1,548.68 mi (2,492.36 km) |
| Siran to Oleggio | 1,577.82 mi (2,539.26 km) |
| Siran to Olgiate Comasco | 1,562.45 mi (2,514.51 km) |
| Siran to Olgiate Olona | 1,565.87 mi (2,520.03 km) |
| Siran to Omegna | 1,589.73 mi (2,558.43 km) |
| Siran to Opera | 1,548.88 mi (2,492.68 km) |
| Siran to Oppeano | 1,453.20 mi (2,338.70 km) |
| Siran to Orbassano | 1,629.89 mi (2,623.06 km) |
