| Merthyr Tudful to Luzzara | 795.31 mi (1,279.92 km) |
| Merthyr Tudful to Luzzi | 1,267.30 mi (2,039.52 km) |
| Merthyr Tudful to Macerata | 974.43 mi (1,568.19 km) |
| Merthyr Tudful to Macerata Campania | 1,113.15 mi (1,791.44 km) |
| Merthyr Tudful to Macomer | 981.79 mi (1,580.04 km) |
| Merthyr Tudful to Maddaloni | 1,118.96 mi (1,800.79 km) |
| Merthyr Tudful to Magenta | 706.93 mi (1,137.69 km) |
| Merthyr Tudful to Magione | 935.97 mi (1,506.30 km) |
| Merthyr Tudful to Maglie | 1,300.78 mi (2,093.41 km) |
| Merthyr Tudful to Magnago | 698.76 mi (1,124.54 km) |
| Merthyr Tudful to Malalbergo | 838.10 mi (1,348.79 km) |
| Merthyr Tudful to Malnate | 691.60 mi (1,113.02 km) |
| Merthyr Tudful to Malo | 792.25 mi (1,275.01 km) |
| Merthyr Tudful to Mandello del Lario | 702.33 mi (1,130.28 km) |
| Merthyr Tudful to Manduria | 1,268.32 mi (2,041.16 km) |
