| Sonsbeck to Marco de Canavezes | 995.50 mi (1,602.10 km) |
| Sonsbeck to Marinha Grande | 1,099.02 mi (1,768.69 km) |
| Sonsbeck to Massama | 1,165.27 mi (1,875.32 km) |
| Sonsbeck to Matosinhos | 1,013.57 mi (1,631.19 km) |
| Sonsbeck to Mealhada | 1,048.70 mi (1,687.71 km) |
| Sonsbeck to Melgaco | 950.00 mi (1,528.87 km) |
| Sonsbeck to Melres | 1,009.93 mi (1,625.33 km) |
| Sonsbeck to Mira | 1,055.07 mi (1,697.96 km) |
| Sonsbeck to Miranda do Corvo | 1,060.63 mi (1,706.93 km) |
| Sonsbeck to Mirandela | 947.98 mi (1,525.62 km) |
| Sonsbeck to Mogadouro | 941.75 mi (1,515.59 km) |
| Sonsbeck to Moimenta da Beira | 989.35 mi (1,592.20 km) |
| Sonsbeck to Moita | 1,162.31 mi (1,870.56 km) |
| Sonsbeck to Moncao | 959.48 mi (1,544.14 km) |
| Sonsbeck to Montalegre | 949.54 mi (1,528.14 km) |
