| Fountain to Mangualde | 4,864.36 mi (7,828.43 km) |
| Fountain to Marco de Canavezes | 4,824.96 mi (7,765.03 km) |
| Fountain to Marinha Grande | 4,846.79 mi (7,800.15 km) |
| Fountain to Massama | 4,870.49 mi (7,838.30 km) |
| Fountain to Matosinhos | 4,801.30 mi (7,726.94 km) |
| Fountain to Mealhada | 4,843.19 mi (7,794.35 km) |
| Fountain to Melgaco | 4,783.80 mi (7,698.78 km) |
| Fountain to Melres | 4,818.74 mi (7,755.01 km) |
| Fountain to Mira | 4,828.93 mi (7,771.41 km) |
| Fountain to Miranda do Corvo | 4,859.34 mi (7,820.34 km) |
| Fountain to Mirandela | 4,854.55 mi (7,812.64 km) |
| Fountain to Mogadouro | 4,880.32 mi (7,854.12 km) |
| Fountain to Moimenta da Beira | 4,855.96 mi (7,814.91 km) |
| Fountain to Moita | 4,887.62 mi (7,865.87 km) |
| Fountain to Moncao | 4,776.39 mi (7,686.86 km) |
