| Merthyr Tudful to Jicin | 815.54 mi (1,312.48 km) |
| Merthyr Tudful to Jihlava | 845.43 mi (1,360.59 km) |
| Merthyr Tudful to Jindrichuv Hradec | 826.10 mi (1,329.48 km) |
| Merthyr Tudful to Jirkov | 733.07 mi (1,179.77 km) |
| Merthyr Tudful to Kadan | 727.53 mi (1,170.85 km) |
| Merthyr Tudful to Karlovy Vary | 712.95 mi (1,147.39 km) |
| Merthyr Tudful to Karvina | 962.42 mi (1,548.86 km) |
| Merthyr Tudful to Kladno | 766.87 mi (1,234.16 km) |
| Merthyr Tudful to Klasterec nad Ohri | 723.12 mi (1,163.74 km) |
| Merthyr Tudful to Klatovy | 747.67 mi (1,203.25 km) |
| Merthyr Tudful to Kolin | 816.16 mi (1,313.48 km) |
| Merthyr Tudful to Koprivnice | 950.44 mi (1,529.59 km) |
| Merthyr Tudful to Kralupy nad Vltavou | 774.32 mi (1,246.15 km) |
| Merthyr Tudful to Kraluv Dvur | 767.76 mi (1,235.59 km) |
| Merthyr Tudful to Krnov | 921.88 mi (1,483.62 km) |
