| Cwmbran to Masanasa | 855.34 mi (1,376.54 km) |
| Cwmbran to Masquefa | 737.47 mi (1,186.84 km) |
| Cwmbran to Matadepera | 734.01 mi (1,181.27 km) |
| Cwmbran to Mazarron | 974.64 mi (1,568.52 km) |
| Cwmbran to Meco | 767.01 mi (1,234.38 km) |
| Cwmbran to Medina del Campo | 720.92 mi (1,160.21 km) |
| Cwmbran to Medina Sidonia | 1,058.86 mi (1,704.06 km) |
| Cwmbran to Mejorada del Campo | 777.93 mi (1,251.96 km) |
| Cwmbran to Meliana | 847.56 mi (1,364.02 km) |
| Cwmbran to Mengibar | 946.29 mi (1,522.91 km) |
| Cwmbran to Merida | 895.50 mi (1,441.16 km) |
| Cwmbran to Miajadas | 876.21 mi (1,410.13 km) |
| Cwmbran to Mieres | 594.53 mi (956.80 km) |
| Cwmbran to Miguelturra | 877.68 mi (1,412.49 km) |
| Cwmbran to Mijas | 1,043.06 mi (1,678.65 km) |
