| Horstel to Marco de Canavezes | 1,065.52 mi (1,714.80 km) |
| Horstel to Marinha Grande | 1,169.10 mi (1,881.48 km) |
| Horstel to Massama | 1,235.36 mi (1,988.12 km) |
| Horstel to Matosinhos | 1,083.52 mi (1,743.75 km) |
| Horstel to Mealhada | 1,118.77 mi (1,800.49 km) |
| Horstel to Melgaco | 1,019.81 mi (1,641.22 km) |
| Horstel to Melres | 1,079.94 mi (1,738.00 km) |
| Horstel to Mira | 1,125.11 mi (1,810.69 km) |
| Horstel to Miranda do Corvo | 1,130.72 mi (1,819.72 km) |
| Horstel to Mirandela | 1,018.06 mi (1,638.41 km) |
| Horstel to Mogadouro | 1,011.83 mi (1,628.39 km) |
| Horstel to Moimenta da Beira | 1,059.43 mi (1,704.99 km) |
| Horstel to Moita | 1,232.39 mi (1,983.34 km) |
| Horstel to Moncao | 1,029.25 mi (1,656.42 km) |
| Horstel to Montalegre | 1,019.52 mi (1,640.75 km) |
