| Warren to Ickenham | 3,728.54 mi (6,000.51 km) |
| Warren to Ifield | 3,750.86 mi (6,036.43 km) |
| Warren to Ilford | 3,749.28 mi (6,033.88 km) |
| Warren to Ilfracombe | 3,594.24 mi (5,784.36 km) |
| Warren to Ilkeston | 3,654.88 mi (5,881.96 km) |
| Warren to Ilkley | 3,609.40 mi (5,808.77 km) |
| Warren to Immingham | 3,678.03 mi (5,919.22 km) |
| Warren to Ince-in-Makerfield | 3,590.37 mi (5,778.15 km) |
| Warren to Inverness | 3,435.14 mi (5,528.33 km) |
| Warren to Inverurie | 3,504.51 mi (5,639.97 km) |
| Warren to Ipswich | 3,775.37 mi (6,075.88 km) |
| Warren to Irlam | 3,599.62 mi (5,793.03 km) |
| Warren to Irthlingborough | 3,699.80 mi (5,954.25 km) |
| Warren to Irvine | 3,461.47 mi (5,570.70 km) |
| Warren to Islington | 3,742.38 mi (6,022.77 km) |
