| Four Corners to Ickenham | 4,943.60 mi (7,955.96 km) |
| Four Corners to Ifield | 4,973.51 mi (8,004.09 km) |
| Four Corners to Ilford | 4,958.02 mi (7,979.16 km) |
| Four Corners to Ilfracombe | 4,860.13 mi (7,821.63 km) |
| Four Corners to Ilkeston | 4,845.07 mi (7,797.39 km) |
| Four Corners to Ilkley | 4,781.07 mi (7,694.39 km) |
| Four Corners to Immingham | 4,839.54 mi (7,788.48 km) |
| Four Corners to Ince-in-Makerfield | 4,780.59 mi (7,693.61 km) |
| Four Corners to Inverness | 4,535.53 mi (7,299.24 km) |
| Four Corners to Inverurie | 4,591.89 mi (7,389.93 km) |
| Four Corners to Ipswich | 4,959.21 mi (7,981.07 km) |
| Four Corners to Irlam | 4,790.32 mi (7,709.27 km) |
| Four Corners to Irthlingborough | 4,898.09 mi (7,882.72 km) |
| Four Corners to Irvine | 4,618.39 mi (7,432.58 km) |
| Four Corners to Islington | 4,953.68 mi (7,972.17 km) |
