| Holyhead to Cognac | 560.09 mi (901.38 km) |
| Holyhead to Cogolin | 861.72 mi (1,386.80 km) |
| Holyhead to Colmar | 635.70 mi (1,023.05 km) |
| Holyhead to Colombes | 425.07 mi (684.08 km) |
| Holyhead to Colomiers | 722.93 mi (1,163.45 km) |
| Holyhead to Combs-la-Ville | 447.47 mi (720.13 km) |
| Holyhead to Comines | 369.14 mi (594.08 km) |
| Holyhead to Compiegne | 418.98 mi (674.29 km) |
| Holyhead to Concarneau | 376.73 mi (606.29 km) |
| Holyhead to Conde-sur-l'Escaut | 402.24 mi (647.34 km) |
| Holyhead to Conflans-Sainte-Honorine | 416.52 mi (670.32 km) |
| Holyhead to Corbas | 678.40 mi (1,091.78 km) |
| Holyhead to Corbeil-Essonnes | 448.03 mi (721.04 km) |
| Holyhead to Cormeilles-en-Parisis | 420.94 mi (677.44 km) |
| Holyhead to Cosne sur Loire | 525.81 mi (846.20 km) |
