| Risca to Mangualde | 792.10 mi (1,274.76 km) |
| Risca to Marco de Canavezes | 759.08 mi (1,221.62 km) |
| Risca to Marinha Grande | 865.79 mi (1,393.35 km) |
| Risca to Massama | 936.77 mi (1,507.58 km) |
| Risca to Matosinhos | 767.70 mi (1,235.49 km) |
| Risca to Mealhada | 816.53 mi (1,314.09 km) |
| Risca to Melgaco | 699.44 mi (1,125.64 km) |
| Risca to Melres | 770.59 mi (1,240.14 km) |
| Risca to Mira | 817.56 mi (1,315.73 km) |
| Risca to Miranda do Corvo | 833.63 mi (1,341.61 km) |
| Risca to Mirandela | 725.62 mi (1,167.77 km) |
| Risca to Mogadouro | 730.34 mi (1,175.37 km) |
| Risca to Moimenta da Beira | 765.04 mi (1,231.22 km) |
| Risca to Moita | 939.48 mi (1,511.95 km) |
| Risca to Moncao | 705.82 mi (1,135.90 km) |
