| River Falls to Ickenham | 3,980.13 mi (6,405.39 km) |
| River Falls to Ifield | 4,005.26 mi (6,445.85 km) |
| River Falls to Ilford | 3,999.36 mi (6,436.35 km) |
| River Falls to Ilfracombe | 3,858.75 mi (6,210.05 km) |
| River Falls to Ilkeston | 3,897.15 mi (6,271.85 km) |
| River Falls to Ilkley | 3,844.88 mi (6,187.74 km) |
| River Falls to Immingham | 3,911.97 mi (6,295.71 km) |
| River Falls to Ince-in-Makerfield | 3,831.17 mi (6,165.67 km) |
| River Falls to Inverness | 3,644.09 mi (5,864.59 km) |
| River Falls to Inverurie | 3,711.25 mi (5,972.68 km) |
| River Falls to Ipswich | 4,018.37 mi (6,466.94 km) |
| River Falls to Irlam | 3,840.78 mi (6,181.15 km) |
| River Falls to Irthlingborough | 3,945.58 mi (6,349.80 km) |
| River Falls to Irvine | 3,688.77 mi (5,936.50 km) |
| River Falls to Islington | 3,993.10 mi (6,426.27 km) |
