| Williamstown to Cortona | 4,293.01 mi (6,908.93 km) |
| Williamstown to Cosenza | 4,625.05 mi (7,443.30 km) |
| Williamstown to Cossato | 4,052.15 mi (6,521.31 km) |
| Williamstown to Costa Volpino | 4,127.00 mi (6,641.76 km) |
| Williamstown to Creazzo | 4,195.67 mi (6,752.27 km) |
| Williamstown to Crema | 4,123.91 mi (6,636.80 km) |
| Williamstown to Cremona | 4,146.47 mi (6,673.10 km) |
| Williamstown to Crevalcore | 4,208.22 mi (6,772.47 km) |
| Williamstown to Crispiano | 4,619.35 mi (7,434.12 km) |
| Williamstown to Crosia | 4,637.96 mi (7,464.08 km) |
| Williamstown to Crotone | 4,672.02 mi (7,518.89 km) |
| Williamstown to Cuneo | 4,061.96 mi (6,537.09 km) |
| Williamstown to Cuorgne | 4,035.18 mi (6,493.99 km) |
| Williamstown to Cusano Milanino | 4,096.57 mi (6,592.79 km) |
| Williamstown to Cutro | 4,667.96 mi (7,512.36 km) |
