| Gourock to Isny im Allgau | 850.26 mi (1,368.36 km) |
| Gourock to Isselburg | 539.53 mi (868.29 km) |
| Gourock to Issum | 550.34 mi (885.68 km) |
| Gourock to Itzehoe | 584.75 mi (941.06 km) |
| Gourock to Jena | 756.63 mi (1,217.67 km) |
| Gourock to Jever | 532.07 mi (856.28 km) |
| Gourock to Jork | 600.66 mi (966.66 km) |
| Gourock to Juchen | 572.06 mi (920.64 km) |
| Gourock to Julich | 575.43 mi (926.07 km) |
| Gourock to Juterbog | 774.09 mi (1,245.78 km) |
| Gourock to Kaarst | 570.77 mi (918.56 km) |
| Gourock to Kaiserslautern | 690.96 mi (1,112.00 km) |
| Gourock to Kalkar | 537.45 mi (864.95 km) |
| Gourock to Kall | 598.92 mi (963.88 km) |
| Gourock to Kaltenkirchen | 603.76 mi (971.65 km) |
