| Leighton Buzzard to Ickenham | 26.40 mi (42.48 km) |
| Leighton Buzzard to Ifield | 58.18 mi (93.62 km) |
| Leighton Buzzard to Ilford | 40.47 mi (65.14 km) |
| Leighton Buzzard to Ilfracombe | 156.38 mi (251.68 km) |
| Leighton Buzzard to Ilkeston | 77.79 mi (125.19 km) |
| Leighton Buzzard to Ilkley | 146.95 mi (236.49 km) |
| Leighton Buzzard to Immingham | 118.73 mi (191.08 km) |
| Leighton Buzzard to Ince-in-Makerfield | 138.40 mi (222.73 km) |
| Leighton Buzzard to Inverness | 409.60 mi (659.19 km) |
| Leighton Buzzard to Inverurie | 376.88 mi (606.53 km) |
| Leighton Buzzard to Ipswich | 77.95 mi (125.45 km) |
| Leighton Buzzard to Irlam | 128.79 mi (207.27 km) |
| Leighton Buzzard to Irthlingborough | 28.23 mi (45.43 km) |
| Leighton Buzzard to Irvine | 303.47 mi (488.38 km) |
| Leighton Buzzard to Islington | 35.14 mi (56.55 km) |
