| Duffel to Marco de Canavezes | 912.41 mi (1,468.39 km) |
| Duffel to Marinha Grande | 1,016.70 mi (1,636.23 km) |
| Duffel to Massama | 1,083.67 mi (1,744.00 km) |
| Duffel to Matosinhos | 929.86 mi (1,496.46 km) |
| Duffel to Mealhada | 966.23 mi (1,555.00 km) |
| Duffel to Melgaco | 865.64 mi (1,393.11 km) |
| Duffel to Melres | 926.69 mi (1,491.37 km) |
| Duffel to Mira | 972.19 mi (1,564.59 km) |
| Duffel to Miranda do Corvo | 978.67 mi (1,575.02 km) |
| Duffel to Mirandela | 865.75 mi (1,393.29 km) |
| Duffel to Mogadouro | 860.42 mi (1,384.72 km) |
| Duffel to Moimenta da Beira | 907.22 mi (1,460.02 km) |
| Duffel to Moita | 1,081.21 mi (1,740.05 km) |
| Duffel to Moncao | 874.96 mi (1,408.11 km) |
| Duffel to Montalegre | 866.07 mi (1,393.81 km) |
