| Grayslake to Ickenham | 3,927.64 mi (6,320.93 km) |
| Grayslake to Ifield | 3,951.04 mi (6,358.58 km) |
| Grayslake to Ilford | 3,947.87 mi (6,353.48 km) |
| Grayslake to Ilfracombe | 3,797.76 mi (6,111.90 km) |
| Grayslake to Ilkeston | 3,850.37 mi (6,196.57 km) |
| Grayslake to Ilkley | 3,802.25 mi (6,119.12 km) |
| Grayslake to Immingham | 3,870.46 mi (6,228.90 km) |
| Grayslake to Ince-in-Makerfield | 3,785.17 mi (6,091.64 km) |
| Grayslake to Inverness | 3,617.37 mi (5,821.60 km) |
| Grayslake to Inverurie | 3,686.06 mi (5,932.15 km) |
| Grayslake to Ipswich | 3,971.40 mi (6,391.35 km) |
| Grayslake to Irlam | 3,794.58 mi (6,106.78 km) |
| Grayslake to Irthlingborough | 3,896.69 mi (6,271.12 km) |
| Grayslake to Irvine | 3,650.86 mi (5,875.49 km) |
| Grayslake to Islington | 3,941.19 mi (6,342.73 km) |
