| Holyhead to Cadiz | 1,161.75 mi (1,869.65 km) |
| Holyhead to Calafell | 884.91 mi (1,424.13 km) |
| Holyhead to Calahorra | 770.50 mi (1,240.01 km) |
| Holyhead to Calasparra | 1,051.13 mi (1,691.63 km) |
| Holyhead to Calatayud | 837.95 mi (1,348.55 km) |
| Holyhead to Caldas de Montbuy | 866.06 mi (1,393.79 km) |
| Holyhead to Caldas de Reyes | 762.28 mi (1,226.77 km) |
| Holyhead to Calella | 875.71 mi (1,409.32 km) |
| Holyhead to Callosa de Segura | 1,064.41 mi (1,713.01 km) |
| Holyhead to Calpe | 1,037.21 mi (1,669.22 km) |
| Holyhead to Calvia | 1,007.35 mi (1,621.17 km) |
| Holyhead to Camas | 1,101.11 mi (1,772.07 km) |
| Holyhead to Cambados | 771.02 mi (1,240.84 km) |
| Holyhead to Cambre | 713.05 mi (1,147.54 km) |
| Holyhead to Cambrils | 886.32 mi (1,426.39 km) |
