| Houghton Regis to Ifield | 55.63 mi (89.52 km) |
| Houghton Regis to Ilford | 35.43 mi (57.02 km) |
| Houghton Regis to Ilfracombe | 161.74 mi (260.30 km) |
| Houghton Regis to Ilkeston | 80.79 mi (130.02 km) |
| Houghton Regis to Ilkley | 149.73 mi (240.97 km) |
| Houghton Regis to Immingham | 118.84 mi (191.26 km) |
| Houghton Regis to Ince-in-Makerfield | 142.53 mi (229.37 km) |
| Houghton Regis to Inverness | 412.34 mi (663.60 km) |
| Houghton Regis to Inverurie | 378.77 mi (609.57 km) |
| Houghton Regis to Ipswich | 72.31 mi (116.37 km) |
| Houghton Regis to Irlam | 132.87 mi (213.83 km) |
| Houghton Regis to Irthlingborough | 29.27 mi (47.11 km) |
| Houghton Regis to Irvine | 307.25 mi (494.47 km) |
| Houghton Regis to Islington | 30.73 mi (49.46 km) |
| Houghton Regis to Iver | 26.47 mi (42.59 km) |
