| Helensburgh to Cehegin | 1,245.83 mi (2,004.98 km) |
| Helensburgh to Cervello | 1,054.05 mi (1,696.32 km) |
| Helensburgh to Cervera | 1,027.50 mi (1,653.60 km) |
| Helensburgh to Ceuti | 1,249.65 mi (2,011.12 km) |
| Helensburgh to Cheste | 1,157.47 mi (1,862.77 km) |
| Helensburgh to Chiclana de la Frontera | 1,355.84 mi (2,182.02 km) |
| Helensburgh to Chipiona | 1,334.71 mi (2,148.01 km) |
| Helensburgh to Chiva | 1,157.78 mi (1,863.27 km) |
| Helensburgh to Churriana de la Vega | 1,304.53 mi (2,099.44 km) |
| Helensburgh to Ciempozuelos | 1,096.81 mi (1,765.15 km) |
| Helensburgh to Cieza | 1,237.79 mi (1,992.02 km) |
| Helensburgh to Cisterniga | 994.94 mi (1,601.20 km) |
| Helensburgh to Ciudad de Melilla | 1,435.06 mi (2,309.51 km) |
| Helensburgh to Ciudad Real | 1,177.48 mi (1,894.98 km) |
| Helensburgh to Ciudad-Rodrigo | 1,068.53 mi (1,719.64 km) |
