| Helensburgh to Coudekerque-Branche | 451.85 mi (727.19 km) |
| Helensburgh to Coueron | 621.50 mi (1,000.21 km) |
| Helensburgh to Coulommiers | 595.89 mi (959.00 km) |
| Helensburgh to Courbevoic | 572.45 mi (921.28 km) |
| Helensburgh to Courcouronnes | 592.93 mi (954.23 km) |
| Helensburgh to Cournon-d'Auvergne | 788.41 mi (1,268.82 km) |
| Helensburgh to Courrieres | 497.77 mi (801.08 km) |
| Helensburgh to Coutras | 784.41 mi (1,262.39 km) |
| Helensburgh to Couzeix | 746.63 mi (1,201.59 km) |
| Helensburgh to Cran-Gevrier | 840.86 mi (1,353.24 km) |
| Helensburgh to Craponne | 819.04 mi (1,318.12 km) |
| Helensburgh to Creil | 555.77 mi (894.42 km) |
| Helensburgh to Crepy-en-Valois | 566.50 mi (911.69 km) |
| Helensburgh to Crest | 888.62 mi (1,430.09 km) |
| Helensburgh to Creteil | 583.47 mi (939.00 km) |
