| Trondheim to Ifield | 935.12 mi (1,504.92 km) |
| Trondheim to Ilford | 902.59 mi (1,452.57 km) |
| Trondheim to Ilfracombe | 997.96 mi (1,606.06 km) |
| Trondheim to Ilkeston | 835.96 mi (1,345.34 km) |
| Trondheim to Ilkley | 786.91 mi (1,266.41 km) |
| Trondheim to Immingham | 776.53 mi (1,249.71 km) |
| Trondheim to Ince-in-Makerfield | 825.52 mi (1,328.55 km) |
| Trondheim to Inverness | 643.32 mi (1,035.32 km) |
| Trondheim to Inverurie | 607.15 mi (977.12 km) |
| Trondheim to Ipswich | 854.27 mi (1,374.82 km) |
| Trondheim to Irlam | 827.78 mi (1,332.18 km) |
| Trondheim to Irthlingborough | 864.62 mi (1,391.47 km) |
| Trondheim to Irvine | 751.07 mi (1,208.74 km) |
| Trondheim to Islington | 906.35 mi (1,458.62 km) |
| Trondheim to Iver | 914.16 mi (1,471.19 km) |
