| Merthyr Tudful to Kelkheim (Taunus) | 526.13 mi (846.72 km) |
| Merthyr Tudful to Kelsterbach | 531.11 mi (854.74 km) |
| Merthyr Tudful to Kemberg | 683.32 mi (1,099.69 km) |
| Merthyr Tudful to Kempen | 421.39 mi (678.16 km) |
| Merthyr Tudful to Kempten | 669.99 mi (1,078.24 km) |
| Merthyr Tudful to Kenzingen | 552.02 mi (888.40 km) |
| Merthyr Tudful to Kerpen | 438.91 mi (706.36 km) |
| Merthyr Tudful to Ketsch | 547.36 mi (880.88 km) |
| Merthyr Tudful to Kevelaer | 412.48 mi (663.82 km) |
| Merthyr Tudful to Kiel | 588.18 mi (946.58 km) |
| Merthyr Tudful to Kierspe | 472.82 mi (760.92 km) |
| Merthyr Tudful to Kirchhain | 534.56 mi (860.28 km) |
| Merthyr Tudful to Kirchheim bei Munchen | 714.78 mi (1,150.32 km) |
| Merthyr Tudful to Kirchheim unter Teck | 605.40 mi (974.29 km) |
| Merthyr Tudful to Kirchhundem | 495.30 mi (797.10 km) |
