| River Grove to Ickenham | 3,939.50 mi (6,340.02 km) |
| River Grove to Ifield | 3,962.72 mi (6,377.38 km) |
| River Grove to Ilford | 3,959.82 mi (6,372.72 km) |
| River Grove to Ilfracombe | 3,808.82 mi (6,129.70 km) |
| River Grove to Ilkeston | 3,862.83 mi (6,216.62 km) |
| River Grove to Ilkley | 3,815.13 mi (6,139.86 km) |
| River Grove to Immingham | 3,883.42 mi (6,249.76 km) |
| River Grove to Ince-in-Makerfield | 3,797.73 mi (6,111.86 km) |
| River Grove to Inverness | 3,631.85 mi (5,844.90 km) |
| River Grove to Inverurie | 3,700.66 mi (5,955.63 km) |
| River Grove to Ipswich | 3,983.79 mi (6,411.29 km) |
| River Grove to Irlam | 3,807.12 mi (6,126.96 km) |
| River Grove to Irthlingborough | 3,908.93 mi (6,290.81 km) |
| River Grove to Irvine | 3,664.26 mi (5,897.06 km) |
| River Grove to Islington | 3,953.10 mi (6,361.90 km) |
