| Os to Busto Arsizio | 1,019.21 mi (1,640.25 km) |
| Os to Busto Garolfo | 1,023.81 mi (1,647.66 km) |
| Os to Cabras | 1,408.33 mi (2,266.48 km) |
| Os to Cadelbosco di Sopra | 1,088.92 mi (1,752.46 km) |
| Os to Cadoneghe | 1,054.74 mi (1,697.45 km) |
| Os to Cagli | 1,190.51 mi (1,915.95 km) |
| Os to Cagliari | 1,459.42 mi (2,348.72 km) |
| Os to Cairo Montenotte | 1,099.62 mi (1,769.67 km) |
| Os to Caivano | 1,384.15 mi (2,227.58 km) |
| Os to Calcinaia | 1,162.97 mi (1,871.61 km) |
| Os to Calcinato | 1,040.32 mi (1,674.23 km) |
| Os to Calderara di Reno | 1,108.18 mi (1,783.45 km) |
| Os to Caldogno | 1,040.22 mi (1,674.07 km) |
| Os to Calenzano | 1,154.92 mi (1,858.66 km) |
| Os to Calolziocorte | 1,009.84 mi (1,625.17 km) |
