| Strada to Marco de Canavezes | 1,004.84 mi (1,617.13 km) |
| Strada to Marinha Grande | 1,075.24 mi (1,730.44 km) |
| Strada to Massama | 1,118.30 mi (1,799.72 km) |
| Strada to Matosinhos | 1,032.34 mi (1,661.39 km) |
| Strada to Mealhada | 1,036.35 mi (1,667.85 km) |
| Strada to Melgaco | 994.83 mi (1,601.02 km) |
| Strada to Melres | 1,019.58 mi (1,640.86 km) |
| Strada to Mira | 1,049.37 mi (1,688.79 km) |
| Strada to Miranda do Corvo | 1,037.03 mi (1,668.93 km) |
| Strada to Mirandela | 950.86 mi (1,530.26 km) |
| Strada to Mogadouro | 930.39 mi (1,497.31 km) |
| Strada to Moimenta da Beira | 982.01 mi (1,580.40 km) |
| Strada to Moita | 1,106.98 mi (1,781.51 km) |
| Strada to Moncao | 1,006.15 mi (1,619.24 km) |
| Strada to Montalegre | 975.62 mi (1,570.12 km) |
