| Saint Helens to Cortona | 971.98 mi (1,564.25 km) |
| Saint Helens to Cosenza | 1,324.48 mi (2,131.54 km) |
| Saint Helens to Cossato | 730.89 mi (1,176.26 km) |
| Saint Helens to Costa Volpino | 777.41 mi (1,251.12 km) |
| Saint Helens to Creazzo | 838.29 mi (1,349.09 km) |
| Saint Helens to Crema | 788.04 mi (1,268.23 km) |
| Saint Helens to Cremona | 811.36 mi (1,305.75 km) |
| Saint Helens to Crevalcore | 868.81 mi (1,398.22 km) |
| Saint Helens to Crispiano | 1,285.59 mi (2,068.96 km) |
| Saint Helens to Crosia | 1,326.19 mi (2,134.30 km) |
| Saint Helens to Crotone | 1,364.12 mi (2,195.34 km) |
| Saint Helens to Cuneo | 780.10 mi (1,255.45 km) |
| Saint Helens to Cuorgne | 725.58 mi (1,167.70 km) |
| Saint Helens to Cusano Milanino | 762.73 mi (1,227.49 km) |
| Saint Helens to Cutro | 1,362.62 mi (2,192.92 km) |
