| Houghton Regis to Carlsbad (New Mexico) | 5,019.68 mi (8,078.40 km) |
| Houghton Regis to Carmel (Indiana) | 3,952.67 mi (6,361.21 km) |
| Houghton Regis to Carmichael (California) | 5,240.49 mi (8,433.76 km) |
| Houghton Regis to Carney (Maryland) | 3,596.61 mi (5,788.19 km) |
| Houghton Regis to Carnot-Moon (Pennsylvania) | 3,694.56 mi (5,945.82 km) |
| Houghton Regis to Carol Stream (Illinois) | 3,936.94 mi (6,335.89 km) |
| Houghton Regis to Carolina (Puerto Rico) | 4,183.56 mi (6,732.79 km) |
| Houghton Regis to Carolina Forest (South Carolina) | 3,957.21 mi (6,368.51 km) |
| Houghton Regis to Carpentersville (Illinois) | 3,933.36 mi (6,330.13 km) |
| Houghton Regis to Carpinteria (California) | 5,429.94 mi (8,738.64 km) |
| Houghton Regis to Carrboro (North Carolina) | 3,861.46 mi (6,214.42 km) |
| Houghton Regis to Carroll (Iowa) | 4,179.14 mi (6,725.67 km) |
| Houghton Regis to Carrollton (Georgia) | 4,218.19 mi (6,788.53 km) |
| Houghton Regis to Carrollton (Texas) | 4,713.61 mi (7,585.83 km) |
| Houghton Regis to Carrollwood (Florida) | 4,388.16 mi (7,062.06 km) |
