| Flensburg to Ifield | 473.79 mi (762.49 km) |
| Flensburg to Ilford | 446.28 mi (718.22 km) |
| Flensburg to Ilfracombe | 614.18 mi (988.43 km) |
| Flensburg to Ilkeston | 454.71 mi (731.79 km) |
| Flensburg to Ilkley | 456.69 mi (734.97 km) |
| Flensburg to Immingham | 398.16 mi (640.77 km) |
| Flensburg to Ince-in-Makerfield | 493.76 mi (794.63 km) |
| Flensburg to Inverness | 556.90 mi (896.24 km) |
| Flensburg to Inverurie | 486.97 mi (783.71 km) |
| Flensburg to Ipswich | 389.07 mi (626.15 km) |
| Flensburg to Irlam | 488.47 mi (786.11 km) |
| Flensburg to Irthlingborough | 445.63 mi (717.17 km) |
| Flensburg to Irvine | 557.94 mi (897.92 km) |
| Flensburg to Islington | 453.55 mi (729.92 km) |
| Flensburg to Iver | 469.00 mi (754.78 km) |
