| Sompting to Mangualde | 791.13 mi (1,273.21 km) |
| Sompting to Marco de Canavezes | 763.72 mi (1,229.08 km) |
| Sompting to Marinha Grande | 870.76 mi (1,401.35 km) |
| Sompting to Massama | 940.65 mi (1,513.83 km) |
| Sompting to Matosinhos | 776.86 mi (1,250.23 km) |
| Sompting to Mealhada | 820.25 mi (1,320.07 km) |
| Sompting to Melgaco | 709.54 mi (1,141.89 km) |
| Sompting to Melres | 776.77 mi (1,250.10 km) |
| Sompting to Mira | 823.71 mi (1,325.63 km) |
| Sompting to Miranda do Corvo | 835.34 mi (1,344.34 km) |
| Sompting to Mirandela | 723.22 mi (1,163.91 km) |
| Sompting to Mogadouro | 723.20 mi (1,163.88 km) |
| Sompting to Moimenta da Beira | 764.32 mi (1,230.06 km) |
| Sompting to Moita | 940.94 mi (1,514.29 km) |
| Sompting to Moncao | 717.53 mi (1,154.76 km) |
