| Portage to Ickenham | 3,840.85 mi (6,181.26 km) |
| Portage to Ifield | 3,863.66 mi (6,217.95 km) |
| Portage to Ilford | 3,861.37 mi (6,214.28 km) |
| Portage to Ilfracombe | 3,708.45 mi (5,968.18 km) |
| Portage to Ilkeston | 3,765.57 mi (6,060.09 km) |
| Portage to Ilkley | 3,718.89 mi (5,984.98 km) |
| Portage to Immingham | 3,787.36 mi (6,095.16 km) |
| Portage to Ince-in-Makerfield | 3,700.73 mi (5,955.75 km) |
| Portage to Inverness | 3,539.76 mi (5,696.69 km) |
| Portage to Inverurie | 3,608.85 mi (5,807.88 km) |
| Portage to Ipswich | 3,886.34 mi (6,254.46 km) |
| Portage to Irlam | 3,710.05 mi (5,970.75 km) |
| Portage to Irthlingborough | 3,811.13 mi (6,133.41 km) |
| Portage to Irvine | 3,569.35 mi (5,744.32 km) |
| Portage to Islington | 3,854.56 mi (6,203.32 km) |
