| Dunstable to Mangualde | 851.80 mi (1,370.84 km) |
| Dunstable to Marco de Canavezes | 822.53 mi (1,323.74 km) |
| Dunstable to Marinha Grande | 929.78 mi (1,496.33 km) |
| Dunstable to Massama | 1,000.18 mi (1,609.63 km) |
| Dunstable to Matosinhos | 834.22 mi (1,342.54 km) |
| Dunstable to Mealhada | 879.54 mi (1,415.48 km) |
| Dunstable to Melgaco | 766.34 mi (1,233.31 km) |
| Dunstable to Melres | 835.13 mi (1,344.01 km) |
| Dunstable to Mira | 882.21 mi (1,419.78 km) |
| Dunstable to Miranda do Corvo | 895.30 mi (1,440.85 km) |
| Dunstable to Mirandela | 784.11 mi (1,261.90 km) |
| Dunstable to Mogadouro | 785.48 mi (1,264.12 km) |
| Dunstable to Moimenta da Beira | 824.83 mi (1,327.44 km) |
| Dunstable to Moita | 1,001.23 mi (1,611.32 km) |
| Dunstable to Moncao | 773.81 mi (1,245.33 km) |
