| Gourock to Idar-Oberstein | 663.50 mi (1,067.80 km) |
| Gourock to Idstein | 670.58 mi (1,079.19 km) |
| Gourock to Illertissen | 825.22 mi (1,328.06 km) |
| Gourock to Illingen | 672.08 mi (1,081.60 km) |
| Gourock to Ilmenau | 742.18 mi (1,194.43 km) |
| Gourock to Ilsede | 657.13 mi (1,057.55 km) |
| Gourock to Ilsenburg | 689.23 mi (1,109.20 km) |
| Gourock to Ilsfeld | 757.57 mi (1,219.19 km) |
| Gourock to Ilvesheim | 715.16 mi (1,150.93 km) |
| Gourock to Immenstadt im Allgau | 862.21 mi (1,387.60 km) |
| Gourock to Ingelheim | 674.75 mi (1,085.91 km) |
| Gourock to Ingolstadt | 843.13 mi (1,356.89 km) |
| Gourock to Iserlohn | 599.41 mi (964.66 km) |
| Gourock to Isernhagen-Sud | 639.52 mi (1,029.21 km) |
| Gourock to Ismaning | 876.69 mi (1,410.89 km) |
