| Herrin to Mangualde | 4,191.41 mi (6,745.43 km) |
| Herrin to Marco de Canavezes | 4,155.55 mi (6,687.72 km) |
| Herrin to Marinha Grande | 4,162.12 mi (6,698.29 km) |
| Herrin to Massama | 4,176.34 mi (6,721.16 km) |
| Herrin to Matosinhos | 4,129.80 mi (6,646.27 km) |
| Herrin to Mealhada | 4,165.71 mi (6,704.07 km) |
| Herrin to Melgaco | 4,122.23 mi (6,634.09 km) |
| Herrin to Melres | 4,147.36 mi (6,674.53 km) |
| Herrin to Mira | 4,150.81 mi (6,680.08 km) |
| Herrin to Miranda do Corvo | 4,179.89 mi (6,726.89 km) |
| Herrin to Mirandela | 4,191.52 mi (6,745.61 km) |
| Herrin to Mogadouro | 4,217.78 mi (6,787.86 km) |
| Herrin to Moimenta da Beira | 4,186.83 mi (6,738.05 km) |
| Herrin to Moita | 4,193.69 mi (6,749.10 km) |
| Herrin to Moncao | 4,113.63 mi (6,620.24 km) |
