| Helensburgh to Carpentras | 931.41 mi (1,498.97 km) |
| Helensburgh to Carquefou | 618.10 mi (994.74 km) |
| Helensburgh to Carqueiranne | 1,013.01 mi (1,630.28 km) |
| Helensburgh to Carrieres-sous-Poissy | 564.85 mi (909.03 km) |
| Helensburgh to Carrieres-sur-Seine | 572.43 mi (921.24 km) |
| Helensburgh to Carros | 995.63 mi (1,602.31 km) |
| Helensburgh to Carvin | 496.11 mi (798.42 km) |
| Helensburgh to Castanet-Tolosan | 906.50 mi (1,458.86 km) |
| Helensburgh to Castelginest | 893.77 mi (1,438.39 km) |
| Helensburgh to Castelnau-le-Lez | 936.27 mi (1,506.78 km) |
| Helensburgh to Castelnaudary | 925.89 mi (1,490.07 km) |
| Helensburgh to Castelsarrasin | 866.39 mi (1,394.32 km) |
| Helensburgh to Castres | 911.54 mi (1,466.98 km) |
| Helensburgh to Caudebec-les-Elbeuf | 523.77 mi (842.93 km) |
| Helensburgh to Caudry | 528.47 mi (850.48 km) |
