| Merthyr Tudful to Kamen | 472.91 mi (761.07 km) |
| Merthyr Tudful to Kamenz | 750.60 mi (1,207.97 km) |
| Merthyr Tudful to Kamp-Lintfort | 425.17 mi (684.24 km) |
| Merthyr Tudful to Kandel | 541.17 mi (870.93 km) |
| Merthyr Tudful to Kappeln | 585.46 mi (942.21 km) |
| Merthyr Tudful to Karben | 537.82 mi (865.54 km) |
| Merthyr Tudful to Karlsdorf-Neuthard | 553.91 mi (891.43 km) |
| Merthyr Tudful to Karlsfeld | 701.60 mi (1,129.11 km) |
| Merthyr Tudful to Karlsruhe | 551.70 mi (887.87 km) |
| Merthyr Tudful to Kassel | 553.52 mi (890.81 km) |
| Merthyr Tudful to Kaufbeuren | 677.50 mi (1,090.32 km) |
| Merthyr Tudful to Kaufering | 681.63 mi (1,096.98 km) |
| Merthyr Tudful to Kaufungen | 559.02 mi (899.66 km) |
| Merthyr Tudful to Kehl | 541.26 mi (871.08 km) |
| Merthyr Tudful to Kelheim | 698.70 mi (1,124.44 km) |
