| Houghton Regis to Caguas (Puerto Rico) | 4,195.25 mi (6,751.60 km) |
| Houghton Regis to Cahokia (Illinois) | 4,175.20 mi (6,719.33 km) |
| Houghton Regis to Calabasas (California) | 5,418.21 mi (8,719.77 km) |
| Houghton Regis to Caldwell (Idaho) | 4,817.62 mi (7,753.21 km) |
| Houghton Regis to Caledonia (Wisconsin) | 3,886.31 mi (6,254.41 km) |
| Houghton Regis to Calera (Alabama) | 4,307.72 mi (6,932.61 km) |
| Houghton Regis to Calexico (California) | 5,397.94 mi (8,687.14 km) |
| Houghton Regis to Calhoun (Georgia) | 4,167.74 mi (6,707.34 km) |
| Houghton Regis to California (Maryland) | 3,645.61 mi (5,867.05 km) |
| Houghton Regis to California City (California) | 5,334.44 mi (8,584.96 km) |
| Houghton Regis to Callaway (Florida) | 4,409.06 mi (7,095.70 km) |
| Houghton Regis to Calumet City (Illinois) | 3,929.21 mi (6,323.46 km) |
| Houghton Regis to Calverton (Maryland) | 3,629.52 mi (5,841.14 km) |
| Houghton Regis to Camano (Washington) | 4,722.70 mi (7,600.44 km) |
| Houghton Regis to Camarillo (California) | 5,424.80 mi (8,730.38 km) |
