| Holyhead to Jicin | 872.19 mi (1,403.66 km) |
| Holyhead to Jihlava | 909.89 mi (1,464.32 km) |
| Holyhead to Jindrichuv Hradec | 893.64 mi (1,438.17 km) |
| Holyhead to Jirkov | 792.46 mi (1,275.34 km) |
| Holyhead to Kadan | 788.37 mi (1,268.75 km) |
| Holyhead to Karlovy Vary | 775.87 mi (1,248.64 km) |
| Holyhead to Karvina | 1,018.36 mi (1,638.89 km) |
| Holyhead to Kladno | 828.15 mi (1,332.78 km) |
| Holyhead to Klasterec nad Ohri | 784.06 mi (1,261.82 km) |
| Holyhead to Klatovy | 816.87 mi (1,314.63 km) |
| Holyhead to Kolin | 876.44 mi (1,410.50 km) |
| Holyhead to Koprivnice | 1,008.84 mi (1,623.57 km) |
| Holyhead to Kralupy nad Vltavou | 834.43 mi (1,342.89 km) |
| Holyhead to Kraluv Dvur | 830.86 mi (1,337.14 km) |
| Holyhead to Krnov | 977.46 mi (1,573.06 km) |
