| Plonsk to Ifield | 881.37 mi (1,418.43 km) |
| Plonsk to Ilford | 861.90 mi (1,387.09 km) |
| Plonsk to Ilfracombe | 1,043.71 mi (1,679.69 km) |
| Plonsk to Ilkeston | 902.97 mi (1,453.19 km) |
| Plonsk to Ilkley | 917.87 mi (1,477.17 km) |
| Plonsk to Immingham | 853.86 mi (1,374.15 km) |
| Plonsk to Ince-in-Makerfield | 951.61 mi (1,531.47 km) |
| Plonsk to Inverness | 1,023.05 mi (1,646.44 km) |
| Plonsk to Inverurie | 953.04 mi (1,533.77 km) |
| Plonsk to Ipswich | 810.12 mi (1,303.77 km) |
| Plonsk to Irlam | 945.02 mi (1,520.86 km) |
| Plonsk to Irthlingborough | 880.73 mi (1,417.40 km) |
| Plonsk to Irvine | 1,028.83 mi (1,655.74 km) |
| Plonsk to Islington | 870.00 mi (1,400.13 km) |
| Plonsk to Iver | 887.28 mi (1,427.94 km) |
