| Merthyr Tudful to Marly-le-Roi | 312.59 mi (503.07 km) |
| Merthyr Tudful to Marmande | 526.29 mi (846.98 km) |
| Merthyr Tudful to Maromme | 248.84 mi (400.47 km) |
| Merthyr Tudful to Marquette-les-Lille | 288.41 mi (464.15 km) |
| Merthyr Tudful to Marseille | 711.09 mi (1,144.40 km) |
| Merthyr Tudful to Martigues | 696.21 mi (1,120.44 km) |
| Merthyr Tudful to Massy | 324.86 mi (522.82 km) |
| Merthyr Tudful to Maubeuge | 335.07 mi (539.24 km) |
| Merthyr Tudful to Mauguio | 657.50 mi (1,058.15 km) |
| Merthyr Tudful to Mauleon | 353.38 mi (568.71 km) |
| Merthyr Tudful to Maurepas | 312.45 mi (502.83 km) |
| Merthyr Tudful to Maxeville | 470.40 mi (757.03 km) |
| Merthyr Tudful to Mayenne | 267.44 mi (430.40 km) |
| Merthyr Tudful to Mazamet | 629.42 mi (1,012.96 km) |
| Merthyr Tudful to Meaux | 336.39 mi (541.37 km) |
