| Helensburgh to Cadiz | 1,348.03 mi (2,169.45 km) |
| Helensburgh to Calafell | 1,062.34 mi (1,709.67 km) |
| Helensburgh to Calahorra | 955.74 mi (1,538.11 km) |
| Helensburgh to Calasparra | 1,236.84 mi (1,990.50 km) |
| Helensburgh to Calatayud | 1,022.92 mi (1,646.23 km) |
| Helensburgh to Caldas de Montbuy | 1,040.96 mi (1,675.26 km) |
| Helensburgh to Caldas de Reyes | 942.97 mi (1,517.56 km) |
| Helensburgh to Calella | 1,048.86 mi (1,687.98 km) |
| Helensburgh to Callosa de Segura | 1,249.11 mi (2,010.25 km) |
| Helensburgh to Calpe | 1,220.21 mi (1,963.74 km) |
| Helensburgh to Calvia | 1,183.72 mi (1,905.01 km) |
| Helensburgh to Camas | 1,287.56 mi (2,072.13 km) |
| Helensburgh to Cambados | 951.32 mi (1,531.00 km) |
| Helensburgh to Cambre | 894.11 mi (1,438.93 km) |
| Helensburgh to Cambrils | 1,065.41 mi (1,714.61 km) |
