| Letchworth to Illzach | 444.43 mi (715.24 km) |
| Letchworth to Ingre | 294.81 mi (474.45 km) |
| Letchworth to Irigny | 492.25 mi (792.20 km) |
| Letchworth to Isbergues | 149.09 mi (239.93 km) |
| Letchworth to Issoire | 471.79 mi (759.27 km) |
| Letchworth to Issoudun | 361.54 mi (581.85 km) |
| Letchworth to Issy-les-Moulineaux | 244.13 mi (392.88 km) |
| Letchworth to Istres | 632.61 mi (1,018.08 km) |
| Letchworth to Ivry-sur-Seine | 247.23 mi (397.88 km) |
| Letchworth to Jarville-la-Malgrange | 364.27 mi (586.24 km) |
| Letchworth to Jeumont | 220.84 mi (355.41 km) |
| Letchworth to Joigny | 319.58 mi (514.32 km) |
| Letchworth to Joinville-le-Pont | 248.43 mi (399.81 km) |
| Letchworth to Joue-les-Tours | 322.14 mi (518.44 km) |
| Letchworth to Jouy-le-Moutier | 227.95 mi (366.85 km) |
