| Shanklin to Mangualde | 761.80 mi (1,226.00 km) |
| Shanklin to Marco de Canavezes | 733.23 mi (1,180.01 km) |
| Shanklin to Marinha Grande | 840.42 mi (1,352.53 km) |
| Shanklin to Massama | 910.64 mi (1,465.53 km) |
| Shanklin to Matosinhos | 745.56 mi (1,199.86 km) |
| Shanklin to Mealhada | 790.06 mi (1,271.48 km) |
| Shanklin to Melgaco | 677.91 mi (1,090.99 km) |
| Shanklin to Melres | 746.02 mi (1,200.61 km) |
| Shanklin to Mira | 793.06 mi (1,276.30 km) |
| Shanklin to Miranda do Corvo | 805.57 mi (1,296.44 km) |
| Shanklin to Mirandela | 694.02 mi (1,116.91 km) |
| Shanklin to Mogadouro | 694.98 mi (1,118.46 km) |
| Shanklin to Moimenta da Beira | 734.88 mi (1,182.68 km) |
| Shanklin to Moita | 911.40 mi (1,466.76 km) |
| Shanklin to Moncao | 685.64 mi (1,103.43 km) |
