| Valley Stream to Mangualde | 3,370.85 mi (5,424.86 km) |
| Valley Stream to Marco de Canavezes | 3,336.69 mi (5,369.89 km) |
| Valley Stream to Marinha Grande | 3,337.06 mi (5,370.48 km) |
| Valley Stream to Massama | 3,347.74 mi (5,387.66 km) |
| Valley Stream to Matosinhos | 3,310.22 mi (5,327.28 km) |
| Valley Stream to Mealhada | 3,343.45 mi (5,380.77 km) |
| Valley Stream to Melgaco | 3,307.02 mi (5,322.14 km) |
| Valley Stream to Melres | 3,327.72 mi (5,355.45 km) |
| Valley Stream to Mira | 3,328.37 mi (5,356.50 km) |
| Valley Stream to Miranda do Corvo | 3,356.77 mi (5,402.20 km) |
| Valley Stream to Mirandela | 3,375.18 mi (5,431.83 km) |
| Valley Stream to Mogadouro | 3,401.46 mi (5,474.13 km) |
| Valley Stream to Moimenta da Beira | 3,367.89 mi (5,420.09 km) |
| Valley Stream to Moita | 3,365.10 mi (5,415.60 km) |
| Valley Stream to Moncao | 3,297.95 mi (5,307.53 km) |
