| Houghton Regis to Carson (California) | 5,422.28 mi (8,726.32 km) |
| Houghton Regis to Carson City (Nevada) | 5,163.69 mi (8,310.15 km) |
| Houghton Regis to Carteret (New Jersey) | 3,451.15 mi (5,554.09 km) |
| Houghton Regis to Cartersville (Georgia) | 4,178.17 mi (6,724.12 km) |
| Houghton Regis to Carthage (Missouri) | 4,402.93 mi (7,085.83 km) |
| Houghton Regis to Cary (Illinois) | 3,927.63 mi (6,320.90 km) |
| Houghton Regis to Cary (North Carolina) | 3,857.28 mi (6,207.70 km) |
| Houghton Regis to Casa de Oro-Mount Helix (California) | 5,442.06 mi (8,758.16 km) |
| Houghton Regis to Casa Grande (Arizona) | 5,259.30 mi (8,464.02 km) |
| Houghton Regis to Casas Adobes (Arizona) | 5,264.74 mi (8,472.77 km) |
| Houghton Regis to Cascades (Virginia) | 3,647.80 mi (5,870.57 km) |
| Houghton Regis to Casper (Wyoming) | 4,537.41 mi (7,302.25 km) |
| Houghton Regis to Casselberry (Florida) | 4,308.03 mi (6,933.10 km) |
| Houghton Regis to Castaic (California) | 5,397.25 mi (8,686.04 km) |
| Houghton Regis to Castle Pines (Colorado) | 4,666.05 mi (7,509.29 km) |
