| Lac to Marco de Canavezes | 1,437.90 mi (2,314.08 km) |
| Lac to Marinha Grande | 1,499.44 mi (2,413.11 km) |
| Lac to Massama | 1,535.41 mi (2,471.00 km) |
| Lac to Matosinhos | 1,466.01 mi (2,359.31 km) |
| Lac to Mealhada | 1,464.38 mi (2,356.70 km) |
| Lac to Melgaco | 1,433.38 mi (2,306.80 km) |
| Lac to Melres | 1,452.18 mi (2,337.06 km) |
| Lac to Mira | 1,478.17 mi (2,378.89 km) |
| Lac to Miranda do Corvo | 1,462.79 mi (2,354.13 km) |
| Lac to Mirandela | 1,384.81 mi (2,228.63 km) |
| Lac to Mogadouro | 1,362.79 mi (2,193.20 km) |
| Lac to Moimenta da Beira | 1,413.07 mi (2,274.11 km) |
| Lac to Moita | 1,522.50 mi (2,450.23 km) |
| Lac to Moncao | 1,444.63 mi (2,324.91 km) |
| Lac to Montalegre | 1,412.22 mi (2,272.75 km) |
