| Letchworth to Jicin | 681.48 mi (1,096.74 km) |
| Letchworth to Jihlava | 713.45 mi (1,148.19 km) |
| Letchworth to Jindrichuv Hradec | 695.20 mi (1,118.82 km) |
| Letchworth to Jirkov | 599.48 mi (964.77 km) |
| Letchworth to Kadan | 594.29 mi (956.42 km) |
| Letchworth to Karlovy Vary | 580.26 mi (933.84 km) |
| Letchworth to Karvina | 828.38 mi (1,333.15 km) |
| Letchworth to Kladno | 633.82 mi (1,020.03 km) |
| Letchworth to Klasterec nad Ohri | 589.89 mi (949.34 km) |
| Letchworth to Klatovy | 617.31 mi (993.46 km) |
| Letchworth to Kolin | 682.92 mi (1,099.05 km) |
| Letchworth to Koprivnice | 816.91 mi (1,314.70 km) |
| Letchworth to Kralupy nad Vltavou | 640.97 mi (1,031.55 km) |
| Letchworth to Kraluv Dvur | 635.23 mi (1,022.30 km) |
| Letchworth to Krnov | 787.74 mi (1,267.74 km) |
