| Houghton Regis to Cocentaina | 909.20 mi (1,463.22 km) |
| Houghton Regis to Coin | 1,072.86 mi (1,726.61 km) |
| Houghton Regis to Colindres | 603.20 mi (970.76 km) |
| Houghton Regis to Collado-Villalba | 796.06 mi (1,281.13 km) |
| Houghton Regis to Colmenar Viejo | 792.01 mi (1,274.61 km) |
| Houghton Regis to Colmenarejo | 801.06 mi (1,289.18 km) |
| Houghton Regis to Conil de la Frontera | 1,114.27 mi (1,793.24 km) |
| Houghton Regis to Consuegra | 872.23 mi (1,403.71 km) |
| Houghton Regis to Corbera de Llobregat | 733.77 mi (1,180.89 km) |
| Houghton Regis to Cordoba | 990.34 mi (1,593.80 km) |
| Houghton Regis to Coria del Rio | 1,045.36 mi (1,682.34 km) |
| Houghton Regis to Crevillente | 943.59 mi (1,518.56 km) |
| Houghton Regis to Cuarte de Huerva | 713.32 mi (1,147.98 km) |
| Houghton Regis to Cubellas | 746.13 mi (1,200.78 km) |
| Houghton Regis to Cuellar | 747.34 mi (1,202.72 km) |
