| Sint-Pieters-Leeuw to Marco de Canavezes | 888.91 mi (1,430.57 km) |
| Sint-Pieters-Leeuw to Marinha Grande | 993.00 mi (1,598.08 km) |
| Sint-Pieters-Leeuw to Massama | 1,059.80 mi (1,705.59 km) |
| Sint-Pieters-Leeuw to Matosinhos | 906.56 mi (1,458.97 km) |
| Sint-Pieters-Leeuw to Mealhada | 942.56 mi (1,516.91 km) |
| Sint-Pieters-Leeuw to Melgaco | 842.58 mi (1,355.99 km) |
| Sint-Pieters-Leeuw to Melres | 903.24 mi (1,453.63 km) |
| Sint-Pieters-Leeuw to Mira | 948.64 mi (1,526.68 km) |
| Sint-Pieters-Leeuw to Miranda do Corvo | 954.88 mi (1,536.73 km) |
| Sint-Pieters-Leeuw to Mirandela | 842.01 mi (1,355.09 km) |
| Sint-Pieters-Leeuw to Mogadouro | 836.48 mi (1,346.18 km) |
| Sint-Pieters-Leeuw to Moimenta da Beira | 883.46 mi (1,421.79 km) |
| Sint-Pieters-Leeuw to Moita | 1,057.25 mi (1,701.47 km) |
| Sint-Pieters-Leeuw to Moncao | 851.97 mi (1,371.11 km) |
| Sint-Pieters-Leeuw to Montalegre | 842.69 mi (1,356.17 km) |
