| Holyhead to Carpentras | 775.55 mi (1,248.13 km) |
| Holyhead to Carquefou | 437.79 mi (704.56 km) |
| Holyhead to Carqueiranne | 858.88 mi (1,382.24 km) |
| Holyhead to Carrieres-sous-Poissy | 417.38 mi (671.70 km) |
| Holyhead to Carrieres-sur-Seine | 426.84 mi (686.93 km) |
| Holyhead to Carros | 850.28 mi (1,368.40 km) |
| Holyhead to Carvin | 377.32 mi (607.23 km) |
| Holyhead to Castanet-Tolosan | 732.09 mi (1,178.19 km) |
| Holyhead to Castelginest | 719.43 mi (1,157.81 km) |
| Holyhead to Castelnau-le-Lez | 773.00 mi (1,244.02 km) |
| Holyhead to Castelnaudary | 752.97 mi (1,211.79 km) |
| Holyhead to Castelsarrasin | 691.35 mi (1,112.62 km) |
| Holyhead to Castres | 740.45 mi (1,191.65 km) |
| Holyhead to Caudebec-les-Elbeuf | 370.09 mi (595.61 km) |
| Holyhead to Caudry | 408.27 mi (657.05 km) |
