| South Valley to Mangualde | 5,107.47 mi (8,219.67 km) |
| South Valley to Marco de Canavezes | 5,068.85 mi (8,157.53 km) |
| South Valley to Marinha Grande | 5,086.89 mi (8,186.56 km) |
| South Valley to Massama | 5,108.08 mi (8,220.65 km) |
| South Valley to Matosinhos | 5,044.63 mi (8,118.55 km) |
| South Valley to Mealhada | 5,085.13 mi (8,183.72 km) |
| South Valley to Melgaco | 5,029.44 mi (8,094.11 km) |
| South Valley to Melres | 5,062.14 mi (8,146.73 km) |
| South Valley to Mira | 5,070.68 mi (8,160.47 km) |
| South Valley to Miranda do Corvo | 5,100.81 mi (8,208.96 km) |
| South Valley to Mirandela | 5,100.00 mi (8,207.66 km) |
| South Valley to Mogadouro | 5,125.94 mi (8,249.40 km) |
| South Valley to Moimenta da Beira | 5,099.97 mi (8,207.61 km) |
| South Valley to Moita | 5,125.30 mi (8,248.37 km) |
| South Valley to Moncao | 5,021.75 mi (8,081.73 km) |
