| Englefield Green to Mangualde | 822.79 mi (1,324.14 km) |
| Englefield Green to Marco de Canavezes | 794.07 mi (1,277.92 km) |
| Englefield Green to Marinha Grande | 901.28 mi (1,450.47 km) |
| Englefield Green to Massama | 971.54 mi (1,563.54 km) |
| Englefield Green to Matosinhos | 806.21 mi (1,297.46 km) |
| Englefield Green to Mealhada | 850.95 mi (1,369.46 km) |
| Englefield Green to Melgaco | 738.48 mi (1,188.46 km) |
| Englefield Green to Melres | 806.81 mi (1,298.43 km) |
| Englefield Green to Mira | 853.86 mi (1,374.15 km) |
| Englefield Green to Miranda do Corvo | 866.51 mi (1,394.51 km) |
| Englefield Green to Mirandela | 755.01 mi (1,215.07 km) |
| Englefield Green to Mogadouro | 755.98 mi (1,216.64 km) |
| Englefield Green to Moimenta da Beira | 795.86 mi (1,280.81 km) |
| Englefield Green to Moita | 972.36 mi (1,564.86 km) |
| Englefield Green to Moncao | 746.11 mi (1,200.76 km) |
