| Houghton Regis to Castrovillari | 1,154.40 mi (1,857.82 km) |
| Houghton Regis to Catania | 1,250.78 mi (2,012.94 km) |
| Houghton Regis to Catanzaro | 1,217.66 mi (1,959.63 km) |
| Houghton Regis to Cattolica | 820.76 mi (1,320.89 km) |
| Houghton Regis to Cava de' Tirreni | 1,057.61 mi (1,702.06 km) |
| Houghton Regis to Cavallino | 1,195.85 mi (1,924.53 km) |
| Houghton Regis to Cavarzere | 740.82 mi (1,192.23 km) |
| Houghton Regis to Cave | 940.43 mi (1,513.47 km) |
| Houghton Regis to Cavriago | 709.91 mi (1,142.50 km) |
| Houghton Regis to Cavriglia | 802.67 mi (1,291.78 km) |
| Houghton Regis to Cazzago San Martino | 648.37 mi (1,043.44 km) |
| Houghton Regis to Ceccano | 966.71 mi (1,555.77 km) |
| Houghton Regis to Cecina | 783.47 mi (1,260.87 km) |
| Houghton Regis to Cefalu | 1,188.49 mi (1,912.68 km) |
| Houghton Regis to Ceglie Messapico | 1,154.18 mi (1,857.48 km) |
