| Letchworth to Isny im Allgau | 544.34 mi (876.03 km) |
| Letchworth to Isselburg | 285.54 mi (459.53 km) |
| Letchworth to Issum | 286.07 mi (460.38 km) |
| Letchworth to Itzehoe | 427.03 mi (687.24 km) |
| Letchworth to Jena | 513.32 mi (826.12 km) |
| Letchworth to Jever | 357.05 mi (574.62 km) |
| Letchworth to Jork | 427.80 mi (688.47 km) |
| Letchworth to Juchen | 295.45 mi (475.48 km) |
| Letchworth to Julich | 292.80 mi (471.21 km) |
| Letchworth to Juterbog | 565.27 mi (909.71 km) |
| Letchworth to Kaarst | 298.41 mi (480.25 km) |
| Letchworth to Kaiserslautern | 391.00 mi (629.26 km) |
| Letchworth to Kalkar | 278.73 mi (448.57 km) |
| Letchworth to Kall | 309.14 mi (497.52 km) |
| Letchworth to Kaltenkirchen | 443.22 mi (713.30 km) |
