| Wealdstone to Illzach | 432.49 mi (696.02 km) |
| Wealdstone to Ingre | 271.57 mi (437.05 km) |
| Wealdstone to Irigny | 471.86 mi (759.39 km) |
| Wealdstone to Isbergues | 138.48 mi (222.87 km) |
| Wealdstone to Issoire | 448.94 mi (722.50 km) |
| Wealdstone to Issoudun | 337.79 mi (543.63 km) |
| Wealdstone to Issy-les-Moulineaux | 223.46 mi (359.62 km) |
| Wealdstone to Istres | 610.63 mi (982.71 km) |
| Wealdstone to Ivry-sur-Seine | 226.83 mi (365.05 km) |
| Wealdstone to Jarville-la-Malgrange | 353.08 mi (568.22 km) |
| Wealdstone to Jeumont | 212.99 mi (342.78 km) |
| Wealdstone to Joigny | 300.00 mi (482.80 km) |
| Wealdstone to Joinville-le-Pont | 228.35 mi (367.49 km) |
| Wealdstone to Joue-les-Tours | 296.65 mi (477.41 km) |
| Wealdstone to Jouy-le-Moutier | 207.03 mi (333.18 km) |
