| Holyhead to Carmona | 1,095.64 mi (1,763.27 km) |
| Holyhead to Cartagena | 1,099.35 mi (1,769.23 km) |
| Holyhead to Cartama | 1,146.78 mi (1,845.57 km) |
| Holyhead to Cartaya | 1,113.83 mi (1,792.53 km) |
| Holyhead to Caspe | 861.31 mi (1,386.14 km) |
| Holyhead to Cassa de la Selva | 861.94 mi (1,387.15 km) |
| Holyhead to Castalla | 1,033.78 mi (1,663.70 km) |
| Holyhead to Castellbisbal | 873.21 mi (1,405.29 km) |
| Holyhead to Castelldefels | 886.03 mi (1,425.93 km) |
| Holyhead to Castello de Ampurias | 842.07 mi (1,355.18 km) |
| Holyhead to Castellon de la Plana | 945.73 mi (1,522.00 km) |
| Holyhead to Castilleja de la Cuesta | 1,102.45 mi (1,774.22 km) |
| Holyhead to Catarroja | 981.31 mi (1,579.27 km) |
| Holyhead to Catral | 1,062.50 mi (1,709.92 km) |
| Holyhead to Caudete | 1,023.78 mi (1,647.62 km) |
