| Sason to Mangualde | 2,591.22 mi (4,170.17 km) |
| Sason to Marco de Canavezes | 2,602.17 mi (4,187.79 km) |
| Sason to Marinha Grande | 2,665.43 mi (4,289.60 km) |
| Sason to Massama | 2,701.14 mi (4,347.06 km) |
| Sason to Matosinhos | 2,630.08 mi (4,232.70 km) |
| Sason to Mealhada | 2,629.97 mi (4,232.52 km) |
| Sason to Melgaco | 2,594.72 mi (4,175.79 km) |
| Sason to Melres | 2,616.63 mi (4,211.06 km) |
| Sason to Mira | 2,643.63 mi (4,254.51 km) |
| Sason to Miranda do Corvo | 2,628.66 mi (4,230.41 km) |
| Sason to Mirandela | 2,548.68 mi (4,101.70 km) |
| Sason to Mogadouro | 2,527.21 mi (4,067.14 km) |
| Sason to Moimenta da Beira | 2,577.95 mi (4,148.81 km) |
| Sason to Moita | 2,688.05 mi (4,326.01 km) |
| Sason to Moncao | 2,606.03 mi (4,194.00 km) |
