| Houghton Regis to Carmona | 1,027.95 mi (1,654.32 km) |
| Houghton Regis to Cartagena | 988.55 mi (1,590.92 km) |
| Houghton Regis to Cartama | 1,068.71 mi (1,719.92 km) |
| Houghton Regis to Cartaya | 1,060.38 mi (1,706.52 km) |
| Houghton Regis to Caspe | 737.63 mi (1,187.10 km) |
| Houghton Regis to Cassa de la Selva | 710.10 mi (1,142.79 km) |
| Houghton Regis to Castalla | 919.47 mi (1,479.74 km) |
| Houghton Regis to Castellbisbal | 730.06 mi (1,174.92 km) |
| Houghton Regis to Castelldefels | 743.47 mi (1,196.49 km) |
| Houghton Regis to Castello de Ampurias | 687.41 mi (1,106.28 km) |
| Houghton Regis to Castellon de la Plana | 823.98 mi (1,326.07 km) |
| Houghton Regis to Castilleja de la Cuesta | 1,038.63 mi (1,671.52 km) |
| Houghton Regis to Catarroja | 863.76 mi (1,390.09 km) |
| Houghton Regis to Catral | 949.75 mi (1,528.47 km) |
| Houghton Regis to Caudete | 912.27 mi (1,468.16 km) |
