| Merthyr Tudful to Menen | 288.39 mi (464.12 km) |
| Merthyr Tudful to Merchtem | 332.61 mi (535.28 km) |
| Merthyr Tudful to Merelbeke | 311.58 mi (501.43 km) |
| Merthyr Tudful to Merksem | 337.98 mi (543.93 km) |
| Merthyr Tudful to Merksplas | 354.95 mi (571.24 km) |
| Merthyr Tudful to Mettet | 362.52 mi (583.42 km) |
| Merthyr Tudful to Meulebeke | 292.70 mi (471.05 km) |
| Merthyr Tudful to Middelkerke | 269.45 mi (433.64 km) |
| Merthyr Tudful to Mol | 367.49 mi (591.42 km) |
| Merthyr Tudful to Mons | 330.12 mi (531.28 km) |
| Merthyr Tudful to Montignies-le-Tilleul | 349.67 mi (562.74 km) |
| Merthyr Tudful to Moorslede | 284.21 mi (457.39 km) |
| Merthyr Tudful to Moortebeek | 338.80 mi (545.24 km) |
| Merthyr Tudful to Morlanwelz-Mariemont | 341.95 mi (550.32 km) |
| Merthyr Tudful to Mortsel | 339.92 mi (547.04 km) |
