| Houghton Regis to Cassina de' Pecchi | 629.93 mi (1,013.78 km) |
| Houghton Regis to Cassino | 986.27 mi (1,587.25 km) |
| Houghton Regis to Castagneto Carducci | 794.28 mi (1,278.26 km) |
| Houghton Regis to Castano Primo | 609.05 mi (980.17 km) |
| Houghton Regis to Castel Bolognese | 771.47 mi (1,241.57 km) |
| Houghton Regis to Castel Gandolfo | 935.49 mi (1,505.52 km) |
| Houghton Regis to Castel Goffredo | 677.58 mi (1,090.46 km) |
| Houghton Regis to Castel Maggiore | 744.27 mi (1,197.79 km) |
| Houghton Regis to Castel Mella | 656.60 mi (1,056.70 km) |
| Houghton Regis to Castel San Giorgio | 1,053.07 mi (1,694.75 km) |
| Houghton Regis to Castel San Giovanni | 656.36 mi (1,056.30 km) |
| Houghton Regis to Castel San Pietro Terme | 759.98 mi (1,223.07 km) |
| Houghton Regis to Castel Volturno | 1,013.47 mi (1,631.02 km) |
| Houghton Regis to Castelbuono | 1,196.75 mi (1,925.98 km) |
| Houghton Regis to Casteldaccia | 1,173.86 mi (1,889.15 km) |
