| Merced to Mangualde | 5,577.30 mi (8,975.80 km) |
| Merced to Marco de Canavezes | 5,535.48 mi (8,908.50 km) |
| Merced to Marinha Grande | 5,570.36 mi (8,964.62 km) |
| Merced to Massama | 5,602.02 mi (9,015.58 km) |
| Merced to Matosinhos | 5,514.07 mi (8,874.04 km) |
| Merced to Mealhada | 5,560.49 mi (8,948.74 km) |
| Merced to Melgaco | 5,488.17 mi (8,832.36 km) |
| Merced to Melres | 5,531.11 mi (8,901.46 km) |
| Merced to Mira | 5,547.04 mi (8,927.10 km) |
| Merced to Miranda do Corvo | 5,578.10 mi (8,977.08 km) |
| Merced to Mirandela | 5,558.91 mi (8,946.20 km) |
| Merced to Mogadouro | 5,583.79 mi (8,986.24 km) |
| Merced to Moimenta da Beira | 5,565.68 mi (8,957.10 km) |
| Merced to Moita | 5,618.69 mi (9,042.40 km) |
| Merced to Moncao | 5,481.96 mi (8,822.36 km) |
