| Helensburgh to Cognac | 738.14 mi (1,187.91 km) |
| Helensburgh to Cogolin | 1,012.87 mi (1,630.06 km) |
| Helensburgh to Colmar | 749.22 mi (1,205.75 km) |
| Helensburgh to Colombes | 570.86 mi (918.72 km) |
| Helensburgh to Colomiers | 897.80 mi (1,444.88 km) |
| Helensburgh to Combs-la-Ville | 592.93 mi (954.23 km) |
| Helensburgh to Comines | 482.75 mi (776.91 km) |
| Helensburgh to Compiegne | 554.35 mi (892.15 km) |
| Helensburgh to Concarneau | 563.57 mi (906.97 km) |
| Helensburgh to Conde-sur-l'Escaut | 515.51 mi (829.63 km) |
| Helensburgh to Conflans-Sainte-Honorine | 562.97 mi (906.01 km) |
| Helensburgh to Corbas | 827.68 mi (1,332.02 km) |
| Helensburgh to Corbeil-Essonnes | 594.67 mi (957.03 km) |
| Helensburgh to Cormeilles-en-Parisis | 566.71 mi (912.03 km) |
| Helensburgh to Cosne sur Loire | 678.09 mi (1,091.28 km) |
