| Fully to Mangualde | 837.43 mi (1,347.71 km) |
| Fully to Marco de Canavezes | 834.48 mi (1,342.96 km) |
| Fully to Marinha Grande | 921.46 mi (1,482.94 km) |
| Fully to Massama | 976.03 mi (1,570.78 km) |
| Fully to Matosinhos | 859.49 mi (1,383.21 km) |
| Fully to Mealhada | 876.20 mi (1,410.11 km) |
| Fully to Melgaco | 810.26 mi (1,303.99 km) |
| Fully to Melres | 849.77 mi (1,367.57 km) |
| Fully to Mira | 887.04 mi (1,427.55 km) |
| Fully to Miranda do Corvo | 881.60 mi (1,418.79 km) |
| Fully to Mirandela | 780.44 mi (1,256.00 km) |
| Fully to Mogadouro | 764.72 mi (1,230.70 km) |
| Fully to Moimenta da Beira | 817.32 mi (1,315.35 km) |
| Fully to Moita | 967.95 mi (1,557.76 km) |
| Fully to Moncao | 821.43 mi (1,321.97 km) |
