| Houghton Regis to Caltagirone | 1,249.56 mi (2,010.97 km) |
| Houghton Regis to Caltanissetta | 1,221.88 mi (1,966.43 km) |
| Houghton Regis to Calvisano | 670.71 mi (1,079.40 km) |
| Houghton Regis to Calvizzano | 1,030.15 mi (1,657.87 km) |
| Houghton Regis to Camaiore | 743.12 mi (1,195.93 km) |
| Houghton Regis to Cameri | 608.03 mi (978.53 km) |
| Houghton Regis to Camisano Vicentino | 709.93 mi (1,142.52 km) |
| Houghton Regis to Campagna | 1,072.36 mi (1,725.80 km) |
| Houghton Regis to Campagnano di Roma | 905.87 mi (1,457.86 km) |
| Houghton Regis to Campi Bisenzio | 775.55 mi (1,248.13 km) |
| Houghton Regis to Campi Salentina | 1,185.13 mi (1,907.28 km) |
| Houghton Regis to Campiglia Marittima | 800.33 mi (1,288.00 km) |
| Houghton Regis to Campobasso | 1,009.88 mi (1,625.25 km) |
| Houghton Regis to Campobello di Licata | 1,232.13 mi (1,982.93 km) |
| Houghton Regis to Campobello di Mazara | 1,177.53 mi (1,895.06 km) |
