| Whitehall to Ickenham | 3,837.33 mi (6,175.59 km) |
| Whitehall to Ifield | 3,858.67 mi (6,209.94 km) |
| Whitehall to Ilford | 3,858.47 mi (6,209.60 km) |
| Whitehall to Ilfracombe | 3,699.38 mi (5,953.58 km) |
| Whitehall to Ilkeston | 3,766.84 mi (6,062.14 km) |
| Whitehall to Ilkley | 3,723.58 mi (5,992.53 km) |
| Whitehall to Immingham | 3,792.42 mi (6,103.31 km) |
| Whitehall to Ince-in-Makerfield | 3,703.03 mi (5,959.44 km) |
| Whitehall to Inverness | 3,557.58 mi (5,725.37 km) |
| Whitehall to Inverurie | 3,627.29 mi (5,837.55 km) |
| Whitehall to Ipswich | 3,886.66 mi (6,254.98 km) |
| Whitehall to Irlam | 3,712.13 mi (5,974.10 km) |
| Whitehall to Irthlingborough | 3,810.51 mi (6,132.42 km) |
| Whitehall to Irvine | 3,578.64 mi (5,759.26 km) |
| Whitehall to Islington | 3,851.38 mi (6,198.20 km) |
