| Houghton Regis to Civril | 1,730.54 mi (2,785.03 km) |
| Houghton Regis to Cizre | 2,286.99 mi (3,680.56 km) |
| Houghton Regis to Cobanlar | 1,753.84 mi (2,822.53 km) |
| Houghton Regis to Corlu | 1,523.95 mi (2,452.56 km) |
| Houghton Regis to Corum | 1,844.97 mi (2,969.19 km) |
| Houghton Regis to Cukurca | 2,350.89 mi (3,783.40 km) |
| Houghton Regis to Cukurcayir | 2,029.12 mi (3,265.56 km) |
| Houghton Regis to Cumayeri | 1,664.69 mi (2,679.05 km) |
| Houghton Regis to Cumra | 1,886.35 mi (3,035.79 km) |
| Houghton Regis to Cungus | 2,126.27 mi (3,421.90 km) |
| Houghton Regis to Dargecit | 2,257.94 mi (3,633.81 km) |
| Houghton Regis to Davutlar | 1,662.04 mi (2,674.80 km) |
| Houghton Regis to Demirozu | 2,068.60 mi (3,329.10 km) |
| Houghton Regis to Demre | 1,839.14 mi (2,959.80 km) |
| Houghton Regis to Denizciler | 2,069.56 mi (3,330.64 km) |
