| Summit to Ickenham | 3,461.52 mi (5,570.77 km) |
| Summit to Ifield | 3,480.94 mi (5,602.03 km) |
| Summit to Ilford | 3,483.29 mi (5,605.82 km) |
| Summit to Ilfracombe | 3,317.58 mi (5,339.12 km) |
| Summit to Ilkeston | 3,397.49 mi (5,467.73 km) |
| Summit to Ilkley | 3,358.97 mi (5,405.75 km) |
| Summit to Immingham | 3,427.86 mi (5,516.60 km) |
| Summit to Ince-in-Makerfield | 3,335.41 mi (5,367.83 km) |
| Summit to Inverness | 3,212.33 mi (5,169.75 km) |
| Summit to Inverurie | 3,282.39 mi (5,282.49 km) |
| Summit to Ipswich | 3,515.39 mi (5,657.48 km) |
| Summit to Irlam | 3,344.17 mi (5,381.93 km) |
| Summit to Irthlingborough | 3,438.49 mi (5,533.71 km) |
| Summit to Irvine | 3,221.21 mi (5,184.04 km) |
| Summit to Islington | 3,475.91 mi (5,593.94 km) |
