| Merthyr Tudful to Mombris | 557.97 mi (897.97 km) |
| Merthyr Tudful to Monchengladbach | 423.60 mi (681.72 km) |
| Merthyr Tudful to Monschau | 425.14 mi (684.20 km) |
| Merthyr Tudful to Montabaur | 493.99 mi (795.00 km) |
| Merthyr Tudful to Moosburg | 713.70 mi (1,148.58 km) |
| Merthyr Tudful to Morbach | 476.93 mi (767.55 km) |
| Merthyr Tudful to Morfelden-Walldorf | 534.60 mi (860.35 km) |
| Merthyr Tudful to Morlenbach | 550.07 mi (885.24 km) |
| Merthyr Tudful to Morsbach | 482.57 mi (776.62 km) |
| Merthyr Tudful to Mosbach | 573.33 mi (922.69 km) |
| Merthyr Tudful to Mosigkau | 665.96 mi (1,071.77 km) |
| Merthyr Tudful to Mossingen | 596.71 mi (960.32 km) |
| Merthyr Tudful to Much | 468.36 mi (753.75 km) |
| Merthyr Tudful to Mucheln | 652.06 mi (1,049.39 km) |
| Merthyr Tudful to Muhlacker | 571.37 mi (919.52 km) |
