| Ridge to Ickenham | 3,392.66 mi (5,459.96 km) |
| Ridge to Ifield | 3,411.77 mi (5,490.71 km) |
| Ridge to Ilford | 3,414.52 mi (5,495.15 km) |
| Ridge to Ilfracombe | 3,247.85 mi (5,226.91 km) |
| Ridge to Ilkeston | 3,329.71 mi (5,358.65 km) |
| Ridge to Ilkley | 3,291.98 mi (5,297.94 km) |
| Ridge to Immingham | 3,360.83 mi (5,408.73 km) |
| Ridge to Ince-in-Makerfield | 3,267.95 mi (5,259.26 km) |
| Ridge to Inverness | 3,148.65 mi (5,067.26 km) |
| Ridge to Inverurie | 3,218.70 mi (5,179.99 km) |
| Ridge to Ipswich | 3,447.23 mi (5,547.78 km) |
| Ridge to Irlam | 3,276.65 mi (5,273.26 km) |
| Ridge to Irthlingborough | 3,370.25 mi (5,423.90 km) |
| Ridge to Irvine | 3,155.50 mi (5,078.29 km) |
| Ridge to Islington | 3,407.10 mi (5,483.20 km) |
