| Os to Cortona | 1,202.49 mi (1,935.22 km) |
| Os to Cosenza | 1,519.22 mi (2,444.94 km) |
| Os to Cossato | 1,018.90 mi (1,639.76 km) |
| Os to Costa Volpino | 1,012.46 mi (1,629.40 km) |
| Os to Creazzo | 1,044.63 mi (1,681.17 km) |
| Os to Crema | 1,041.16 mi (1,675.58 km) |
| Os to Cremona | 1,059.58 mi (1,705.22 km) |
| Os to Crevalcore | 1,096.95 mi (1,765.38 km) |
| Os to Crispiano | 1,446.44 mi (2,327.81 km) |
| Os to Crosia | 1,508.42 mi (2,427.57 km) |
| Os to Crotone | 1,545.56 mi (2,487.33 km) |
| Os to Cuneo | 1,098.05 mi (1,767.15 km) |
| Os to Cuorgne | 1,029.02 mi (1,656.05 km) |
| Os to Cusano Milanino | 1,025.38 mi (1,650.20 km) |
| Os to Cutro | 1,547.04 mi (2,489.72 km) |
