| Lye to Mangualde | 861.25 mi (1,386.05 km) |
| Lye to Marco de Canavezes | 828.94 mi (1,334.05 km) |
| Lye to Marinha Grande | 935.84 mi (1,506.10 km) |
| Lye to Massama | 1,006.77 mi (1,620.24 km) |
| Lye to Matosinhos | 838.10 mi (1,348.80 km) |
| Lye to Mealhada | 886.37 mi (1,426.47 km) |
| Lye to Melgaco | 769.85 mi (1,238.95 km) |
| Lye to Melres | 840.66 mi (1,352.91 km) |
| Lye to Mira | 887.69 mi (1,428.60 km) |
| Lye to Miranda do Corvo | 903.23 mi (1,453.61 km) |
| Lye to Mirandela | 794.43 mi (1,278.52 km) |
| Lye to Mogadouro | 798.39 mi (1,284.89 km) |
| Lye to Moimenta da Beira | 834.19 mi (1,342.49 km) |
| Lye to Moita | 1,009.18 mi (1,624.11 km) |
| Lye to Moncao | 776.41 mi (1,249.50 km) |
