| Letchworth to Kamen | 338.35 mi (544.52 km) |
| Letchworth to Kamenz | 615.66 mi (990.80 km) |
| Letchworth to Kamp-Lintfort | 291.14 mi (468.55 km) |
| Letchworth to Kandel | 420.45 mi (676.65 km) |
| Letchworth to Kappeln | 457.98 mi (737.06 km) |
| Letchworth to Karben | 408.26 mi (657.04 km) |
| Letchworth to Karlsdorf-Neuthard | 431.90 mi (695.08 km) |
| Letchworth to Karlsfeld | 579.00 mi (931.81 km) |
| Letchworth to Karlsruhe | 431.00 mi (693.63 km) |
| Letchworth to Kassel | 419.24 mi (674.71 km) |
| Letchworth to Kaufbeuren | 558.78 mi (899.27 km) |
| Letchworth to Kaufering | 561.04 mi (902.91 km) |
| Letchworth to Kaufungen | 424.80 mi (683.65 km) |
| Letchworth to Kehl | 426.03 mi (685.63 km) |
| Letchworth to Kelheim | 571.85 mi (920.31 km) |
