| Letchworth to Cividale del Friuli | 738.39 mi (1,188.33 km) |
| Letchworth to Civita Castellana | 892.13 mi (1,435.75 km) |
| Letchworth to Civitanova Marche | 881.60 mi (1,418.80 km) |
| Letchworth to Civitavecchia | 884.59 mi (1,423.61 km) |
| Letchworth to Civitella in Val di Chiana | 809.49 mi (1,302.76 km) |
| Letchworth to Clusone | 624.13 mi (1,004.45 km) |
| Letchworth to Coccaglio | 641.17 mi (1,031.87 km) |
| Letchworth to Codigoro | 749.47 mi (1,206.16 km) |
| Letchworth to Codogno | 653.27 mi (1,051.34 km) |
| Letchworth to Codroipo | 727.43 mi (1,170.68 km) |
| Letchworth to Cogoleto | 663.90 mi (1,068.45 km) |
| Letchworth to Colle di Val d'Elsa | 792.26 mi (1,275.03 km) |
| Letchworth to Colle Salvetti | 761.56 mi (1,225.61 km) |
| Letchworth to Collecchio | 691.06 mi (1,112.15 km) |
| Letchworth to Colleferro | 941.93 mi (1,515.89 km) |
