| Holyhead to Coudekerque-Branche | 336.72 mi (541.91 km) |
| Holyhead to Coueron | 440.10 mi (708.28 km) |
| Holyhead to Coulommiers | 456.34 mi (734.40 km) |
| Holyhead to Courbevoic | 426.42 mi (686.26 km) |
| Holyhead to Courcouronnes | 445.94 mi (717.67 km) |
| Holyhead to Cournon-d'Auvergne | 628.99 mi (1,012.27 km) |
| Holyhead to Courrieres | 378.28 mi (608.78 km) |
| Holyhead to Coutras | 606.12 mi (975.45 km) |
| Holyhead to Couzeix | 576.51 mi (927.81 km) |
| Holyhead to Cran-Gevrier | 700.62 mi (1,127.54 km) |
| Holyhead to Craponne | 669.06 mi (1,076.75 km) |
| Holyhead to Creil | 415.46 mi (668.63 km) |
| Holyhead to Crepy-en-Valois | 429.64 mi (691.45 km) |
| Holyhead to Crest | 735.43 mi (1,183.56 km) |
| Holyhead to Creteil | 438.27 mi (705.33 km) |
