| Houghton Regis to Chivasso | 601.83 mi (968.54 km) |
| Houghton Regis to Ciampino | 930.95 mi (1,498.22 km) |
| Houghton Regis to Cicciano | 1,037.73 mi (1,670.06 km) |
| Houghton Regis to Cingoli | 867.58 mi (1,396.23 km) |
| Houghton Regis to Cinisello Balsamo | 623.38 mi (1,003.23 km) |
| Houghton Regis to Cinisi | 1,154.93 mi (1,858.68 km) |
| Houghton Regis to Cirie | 591.10 mi (951.29 km) |
| Houghton Regis to Ciro Marina | 1,209.27 mi (1,946.13 km) |
| Houghton Regis to Cislago | 610.18 mi (982.00 km) |
| Houghton Regis to Cisterna di Latina | 949.58 mi (1,528.20 km) |
| Houghton Regis to Cisternino | 1,147.56 mi (1,846.82 km) |
| Houghton Regis to Citta di Castello | 830.26 mi (1,336.18 km) |
| Houghton Regis to Citta Sant'Angelo | 939.44 mi (1,511.89 km) |
| Houghton Regis to Cittadella | 706.08 mi (1,136.33 km) |
| Houghton Regis to Cittanova | 1,231.99 mi (1,982.70 km) |
