| Houghton Regis to Carmignano | 771.84 mi (1,242.15 km) |
| Houghton Regis to Carovigno | 1,157.43 mi (1,862.70 km) |
| Houghton Regis to Carpenedolo | 672.79 mi (1,082.75 km) |
| Houghton Regis to Carpi | 717.16 mi (1,154.16 km) |
| Houghton Regis to Carrara | 729.04 mi (1,173.28 km) |
| Houghton Regis to Carugate | 627.14 mi (1,009.29 km) |
| Houghton Regis to Casal di Principe | 1,022.17 mi (1,645.03 km) |
| Houghton Regis to Casale Monferrato | 621.81 mi (1,000.71 km) |
| Houghton Regis to Casale sul Sile | 728.21 mi (1,171.94 km) |
| Houghton Regis to Casalecchio di Reno | 745.73 mi (1,200.14 km) |
| Houghton Regis to Casalgrande | 722.47 mi (1,162.70 km) |
| Houghton Regis to Casalmaggiore | 691.35 mi (1,112.61 km) |
| Houghton Regis to Casalnuovo di Napoli | 1,034.56 mi (1,664.96 km) |
| Houghton Regis to Casalpusterlengo | 656.57 mi (1,056.65 km) |
| Houghton Regis to Casaluce | 1,025.21 mi (1,649.92 km) |
