| Helston to Cividale del Friuli | 903.38 mi (1,453.84 km) |
| Helston to Civita Castellana | 998.99 mi (1,607.72 km) |
| Helston to Civitanova Marche | 1,011.68 mi (1,628.14 km) |
| Helston to Civitavecchia | 983.45 mi (1,582.70 km) |
| Helston to Civitella in Val di Chiana | 924.12 mi (1,487.22 km) |
| Helston to Clusone | 759.94 mi (1,223.01 km) |
| Helston to Coccaglio | 771.77 mi (1,242.05 km) |
| Helston to Codigoro | 887.16 mi (1,427.75 km) |
| Helston to Codogno | 774.47 mi (1,246.39 km) |
| Helston to Codroipo | 887.65 mi (1,428.53 km) |
| Helston to Cogoleto | 760.94 mi (1,224.61 km) |
| Helston to Colle di Val d'Elsa | 901.19 mi (1,450.32 km) |
| Helston to Colle Salvetti | 866.80 mi (1,394.98 km) |
| Helston to Collecchio | 810.71 mi (1,304.71 km) |
| Helston to Colleferro | 1,047.70 mi (1,686.12 km) |
