| Gateway to Mangualde | 4,242.98 mi (6,828.42 km) |
| Gateway to Marco de Canavezes | 4,215.10 mi (6,783.55 km) |
| Gateway to Marinha Grande | 4,194.32 mi (6,750.11 km) |
| Gateway to Massama | 4,190.42 mi (6,743.82 km) |
| Gateway to Matosinhos | 4,187.03 mi (6,738.38 km) |
| Gateway to Mealhada | 4,210.61 mi (6,776.32 km) |
| Gateway to Melgaco | 4,196.94 mi (6,754.32 km) |
| Gateway to Melres | 4,203.90 mi (6,765.52 km) |
| Gateway to Mira | 4,195.31 mi (6,751.71 km) |
| Gateway to Miranda do Corvo | 4,220.58 mi (6,792.36 km) |
| Gateway to Mirandela | 4,260.20 mi (6,856.13 km) |
| Gateway to Mogadouro | 4,285.94 mi (6,897.55 km) |
| Gateway to Moimenta da Beira | 4,245.27 mi (6,832.11 km) |
| Gateway to Moita | 4,207.33 mi (6,771.04 km) |
| Gateway to Moncao | 4,186.74 mi (6,737.91 km) |
