| Penwortham to Ickenham | 178.29 mi (286.94 km) |
| Penwortham to Ifield | 209.47 mi (337.10 km) |
| Penwortham to Ilford | 191.21 mi (307.72 km) |
| Penwortham to Ilfracombe | 184.59 mi (297.07 km) |
| Penwortham to Ilkeston | 78.79 mi (126.81 km) |
| Penwortham to Ilkley | 38.78 mi (62.41 km) |
| Penwortham to Immingham | 102.75 mi (165.36 km) |
| Penwortham to Ince-in-Makerfield | 14.67 mi (23.61 km) |
| Penwortham to Inverness | 264.83 mi (426.21 km) |
| Penwortham to Inverurie | 244.95 mi (394.21 km) |
| Penwortham to Ipswich | 198.89 mi (320.08 km) |
| Penwortham to Irlam | 23.77 mi (38.25 km) |
| Penwortham to Irthlingborough | 131.25 mi (211.22 km) |
| Penwortham to Irvine | 151.28 mi (243.46 km) |
| Penwortham to Islington | 187.22 mi (301.31 km) |
