| Gourock to Illzach | 764.75 mi (1,230.75 km) |
| Gourock to Ingre | 622.32 mi (1,001.52 km) |
| Gourock to Irigny | 823.89 mi (1,325.92 km) |
| Gourock to Isbergues | 474.78 mi (764.08 km) |
| Gourock to Issoire | 799.77 mi (1,287.11 km) |
| Gourock to Issoudun | 687.09 mi (1,105.77 km) |
| Gourock to Issy-les-Moulineaux | 575.52 mi (926.21 km) |
| Gourock to Istres | 962.41 mi (1,548.85 km) |
| Gourock to Ivry-sur-Seine | 578.78 mi (931.46 km) |
| Gourock to Jarville-la-Malgrange | 684.07 mi (1,100.91 km) |
| Gourock to Jeumont | 537.37 mi (864.81 km) |
| Gourock to Joigny | 651.42 mi (1,048.35 km) |
| Gourock to Joinville-le-Pont | 580.12 mi (933.61 km) |
| Gourock to Joue-les-Tours | 638.61 mi (1,027.75 km) |
| Gourock to Jouy-le-Moutier | 559.17 mi (899.89 km) |
