| Gresham to Ickenham | 4,896.29 mi (7,879.82 km) |
| Gresham to Ifield | 4,926.20 mi (7,927.96 km) |
| Gresham to Ilford | 4,910.71 mi (7,903.02 km) |
| Gresham to Ilfracombe | 4,812.87 mi (7,745.57 km) |
| Gresham to Ilkeston | 4,797.77 mi (7,721.26 km) |
| Gresham to Ilkley | 4,733.76 mi (7,618.25 km) |
| Gresham to Immingham | 4,792.23 mi (7,712.35 km) |
| Gresham to Ince-in-Makerfield | 4,733.28 mi (7,617.48 km) |
| Gresham to Inverness | 4,488.25 mi (7,223.14 km) |
| Gresham to Inverurie | 4,544.62 mi (7,313.86 km) |
| Gresham to Ipswich | 4,911.90 mi (7,904.94 km) |
| Gresham to Irlam | 4,743.01 mi (7,633.14 km) |
| Gresham to Irthlingborough | 4,850.78 mi (7,806.58 km) |
| Gresham to Irvine | 4,571.08 mi (7,356.44 km) |
| Gresham to Islington | 4,906.37 mi (7,896.04 km) |
