| Merthyr Tudful to Mels | 659.12 mi (1,060.76 km) |
| Merthyr Tudful to Mendrisio | 692.26 mi (1,114.08 km) |
| Merthyr Tudful to Meyrin | 572.96 mi (922.10 km) |
| Merthyr Tudful to Mohlin | 578.48 mi (930.98 km) |
| Merthyr Tudful to Monthey | 601.73 mi (968.39 km) |
| Merthyr Tudful to Montreux | 592.01 mi (952.74 km) |
| Merthyr Tudful to Morges | 573.47 mi (922.91 km) |
| Merthyr Tudful to Munchenstein | 571.30 mi (919.42 km) |
| Merthyr Tudful to Muri | 590.27 mi (949.95 km) |
| Merthyr Tudful to Muttenz | 572.58 mi (921.47 km) |
| Merthyr Tudful to Naters | 635.48 mi (1,022.71 km) |
| Merthyr Tudful to Neuchatel | 567.14 mi (912.72 km) |
| Merthyr Tudful to Neuenhof | 601.49 mi (968.01 km) |
| Merthyr Tudful to Neuhausen am Rheinfall | 603.84 mi (971.78 km) |
| Merthyr Tudful to Niederhasli | 606.24 mi (975.65 km) |
