| Casier to Ifield | 685.88 mi (1,103.83 km) |
| Casier to Ilford | 689.94 mi (1,110.35 km) |
| Casier to Ilfracombe | 842.54 mi (1,355.93 km) |
| Casier to Ilkeston | 792.51 mi (1,275.42 km) |
| Casier to Ilkley | 847.93 mi (1,364.61 km) |
| Casier to Immingham | 783.13 mi (1,260.32 km) |
| Casier to Ince-in-Makerfield | 858.69 mi (1,381.93 km) |
| Casier to Inverness | 1,076.63 mi (1,732.67 km) |
| Casier to Inverurie | 1,017.74 mi (1,637.89 km) |
| Casier to Ipswich | 671.58 mi (1,080.80 km) |
| Casier to Irlam | 849.00 mi (1,366.33 km) |
| Casier to Irthlingborough | 743.46 mi (1,196.49 km) |
| Casier to Irvine | 1,008.47 mi (1,622.97 km) |
| Casier to Islington | 696.39 mi (1,120.72 km) |
| Casier to Iver | 710.58 mi (1,143.57 km) |
