| Merthyr Tudful to Kidricevo | 939.45 mi (1,511.90 km) |
| Merthyr Tudful to Kobarid | 854.63 mi (1,375.40 km) |
| Merthyr Tudful to Kobilje | 954.75 mi (1,536.52 km) |
| Merthyr Tudful to Kocevje | 928.97 mi (1,495.03 km) |
| Merthyr Tudful to Komen | 877.88 mi (1,412.81 km) |
| Merthyr Tudful to Komenda | 894.96 mi (1,440.29 km) |
| Merthyr Tudful to Koper | 887.59 mi (1,428.43 km) |
| Merthyr Tudful to Kostanjevica na Krki | 944.21 mi (1,519.56 km) |
| Merthyr Tudful to Kostel | 936.16 mi (1,506.60 km) |
| Merthyr Tudful to Kozje | 941.36 mi (1,514.98 km) |
| Merthyr Tudful to Kranj | 887.01 mi (1,427.50 km) |
| Merthyr Tudful to Kranjska Gora | 854.34 mi (1,374.93 km) |
| Merthyr Tudful to Krizevci | 948.19 mi (1,525.96 km) |
| Merthyr Tudful to Krsko | 942.78 mi (1,517.25 km) |
| Merthyr Tudful to Kuzma | 936.84 mi (1,507.69 km) |
