| Grenade to Ifield | 512.76 mi (825.21 km) |
| Grenade to Ilford | 540.87 mi (870.45 km) |
| Grenade to Ilfracombe | 572.23 mi (920.91 km) |
| Grenade to Ilkeston | 646.64 mi (1,040.67 km) |
| Grenade to Ilkley | 715.52 mi (1,151.51 km) |
| Grenade to Immingham | 683.49 mi (1,099.98 km) |
| Grenade to Ince-in-Makerfield | 697.67 mi (1,122.79 km) |
| Grenade to Inverness | 976.62 mi (1,571.72 km) |
| Grenade to Inverurie | 946.85 mi (1,523.80 km) |
| Grenade to Ipswich | 572.68 mi (921.64 km) |
| Grenade to Irlam | 689.35 mi (1,109.40 km) |
| Grenade to Irthlingborough | 597.40 mi (961.42 km) |
| Grenade to Irvine | 860.05 mi (1,384.12 km) |
| Grenade to Islington | 540.92 mi (870.53 km) |
| Grenade to Iver | 541.92 mi (872.13 km) |
