| Merthyr Tudful to Melun | 346.85 mi (558.21 km) |
| Merthyr Tudful to Mende | 590.85 mi (950.88 km) |
| Merthyr Tudful to Mennecy | 338.13 mi (544.17 km) |
| Merthyr Tudful to Menton | 745.69 mi (1,200.07 km) |
| Merthyr Tudful to Mericourt | 286.35 mi (460.84 km) |
| Merthyr Tudful to Merignac | 493.24 mi (793.79 km) |
| Merthyr Tudful to Meru | 297.76 mi (479.20 km) |
| Merthyr Tudful to Merville | 271.34 mi (436.68 km) |
| Merthyr Tudful to Mery-sur-Oise | 306.98 mi (494.03 km) |
| Merthyr Tudful to Metz | 457.50 mi (736.28 km) |
| Merthyr Tudful to Meudon | 320.00 mi (514.99 km) |
| Merthyr Tudful to Meylan | 615.34 mi (990.30 km) |
| Merthyr Tudful to Meyzieu | 561.68 mi (903.93 km) |
| Merthyr Tudful to Meze | 659.66 mi (1,061.62 km) |
| Merthyr Tudful to Millau | 606.36 mi (975.84 km) |
