| Helston to Cortona | 940.88 mi (1,514.20 km) |
| Helston to Cosenza | 1,286.18 mi (2,069.90 km) |
| Helston to Cossato | 696.12 mi (1,120.30 km) |
| Helston to Costa Volpino | 767.99 mi (1,235.97 km) |
| Helston to Creazzo | 836.59 mi (1,346.37 km) |
| Helston to Crema | 766.20 mi (1,233.07 km) |
| Helston to Cremona | 789.09 mi (1,269.92 km) |
| Helston to Crevalcore | 850.71 mi (1,369.08 km) |
| Helston to Crispiano | 1,267.23 mi (2,039.41 km) |
| Helston to Crosia | 1,294.35 mi (2,083.05 km) |
| Helston to Crotone | 1,330.56 mi (2,141.33 km) |
| Helston to Cuneo | 717.97 mi (1,155.46 km) |
| Helston to Cuorgne | 681.51 mi (1,096.78 km) |
| Helston to Cusano Milanino | 738.89 mi (1,189.13 km) |
| Helston to Cutro | 1,327.59 mi (2,136.54 km) |
