| Salt to Mangualde | 555.43 mi (893.88 km) |
| Salt to Marco de Canavezes | 567.58 mi (913.43 km) |
| Salt to Marinha Grande | 630.94 mi (1,015.39 km) |
| Salt to Massama | 672.15 mi (1,081.71 km) |
| Salt to Matosinhos | 595.82 mi (958.88 km) |
| Salt to Mealhada | 594.23 mi (956.31 km) |
| Salt to Melgaco | 566.90 mi (912.33 km) |
| Salt to Melres | 581.75 mi (936.23 km) |
| Salt to Mira | 607.84 mi (978.22 km) |
| Salt to Miranda do Corvo | 593.45 mi (955.06 km) |
| Salt to Mirandela | 514.90 mi (828.65 km) |
| Salt to Mogadouro | 492.43 mi (792.48 km) |
| Salt to Moimenta da Beira | 542.49 mi (873.05 km) |
| Salt to Moita | 660.70 mi (1,063.29 km) |
| Salt to Moncao | 577.97 mi (930.15 km) |
