| Letterkenny to Jicin | 1,009.90 mi (1,625.27 km) |
| Letterkenny to Jihlava | 1,053.49 mi (1,695.43 km) |
| Letterkenny to Jindrichuv Hradec | 1,039.79 mi (1,673.38 km) |
| Letterkenny to Jirkov | 933.40 mi (1,502.16 km) |
| Letterkenny to Kadan | 930.50 mi (1,497.50 km) |
| Letterkenny to Karlovy Vary | 919.78 mi (1,480.24 km) |
| Letterkenny to Karvina | 1,153.87 mi (1,856.97 km) |
| Letterkenny to Kladno | 970.14 mi (1,561.29 km) |
| Letterkenny to Klasterec nad Ohri | 926.34 mi (1,490.79 km) |
| Letterkenny to Klatovy | 965.00 mi (1,553.03 km) |
| Letterkenny to Kolin | 1,017.07 mi (1,636.82 km) |
| Letterkenny to Koprivnice | 1,146.55 mi (1,845.19 km) |
| Letterkenny to Kralupy nad Vltavou | 975.42 mi (1,569.78 km) |
| Letterkenny to Kraluv Dvur | 974.24 mi (1,567.90 km) |
| Letterkenny to Krnov | 1,113.06 mi (1,791.29 km) |
