| Romanshorn to Ifield | 495.27 mi (797.06 km) |
| Romanshorn to Ilford | 498.20 mi (801.77 km) |
| Romanshorn to Ilfracombe | 655.13 mi (1,054.33 km) |
| Romanshorn to Ilkeston | 600.18 mi (965.89 km) |
| Romanshorn to Ilkley | 655.93 mi (1,055.62 km) |
| Romanshorn to Immingham | 591.63 mi (952.14 km) |
| Romanshorn to Ince-in-Makerfield | 666.36 mi (1,072.41 km) |
| Romanshorn to Inverness | 888.44 mi (1,429.80 km) |
| Romanshorn to Inverurie | 831.36 mi (1,337.95 km) |
| Romanshorn to Ipswich | 479.27 mi (771.31 km) |
| Romanshorn to Irlam | 656.67 mi (1,056.80 km) |
| Romanshorn to Irthlingborough | 551.22 mi (887.10 km) |
| Romanshorn to Irvine | 816.93 mi (1,314.72 km) |
| Romanshorn to Islington | 504.77 mi (812.36 km) |
| Romanshorn to Iver | 519.27 mi (835.69 km) |
