| Slough to Carmona | 1,000.94 mi (1,610.85 km) |
| Slough to Cartagena | 961.17 mi (1,546.85 km) |
| Slough to Cartama | 1,041.44 mi (1,676.04 km) |
| Slough to Cartaya | 1,033.83 mi (1,663.79 km) |
| Slough to Caspe | 710.43 mi (1,143.32 km) |
| Slough to Cassa de la Selva | 684.36 mi (1,101.37 km) |
| Slough to Castalla | 892.12 mi (1,435.73 km) |
| Slough to Castellbisbal | 703.71 mi (1,132.50 km) |
| Slough to Castelldefels | 717.08 mi (1,154.04 km) |
| Slough to Castello de Ampurias | 661.90 mi (1,065.22 km) |
| Slough to Castellon de la Plana | 796.76 mi (1,282.27 km) |
| Slough to Castilleja de la Cuesta | 1,011.73 mi (1,628.23 km) |
| Slough to Catarroja | 836.46 mi (1,346.16 km) |
| Slough to Catral | 922.39 mi (1,484.44 km) |
| Slough to Caudete | 884.88 mi (1,424.08 km) |
