| Ruislip to Ickenham | 1.41 mi (2.27 km) |
| Ruislip to Ifield | 32.75 mi (52.71 km) |
| Ruislip to Ilford | 22.32 mi (35.92 km) |
| Ruislip to Ilfracombe | 160.96 mi (259.04 km) |
| Ruislip to Ilkeston | 103.25 mi (166.17 km) |
| Ruislip to Ilkley | 172.37 mi (277.41 km) |
| Ruislip to Immingham | 141.09 mi (227.07 km) |
| Ruislip to Ince-in-Makerfield | 163.37 mi (262.92 km) |
| Ruislip to Inverness | 435.03 mi (700.11 km) |
| Ruislip to Inverurie | 401.76 mi (646.57 km) |
| Ruislip to Ipswich | 75.62 mi (121.70 km) |
| Ruislip to Irlam | 153.84 mi (247.58 km) |
| Ruislip to Irthlingborough | 52.25 mi (84.09 km) |
| Ruislip to Irvine | 328.70 mi (529.00 km) |
| Ruislip to Islington | 14.36 mi (23.11 km) |
