| Irig to Mangualde | 1,425.23 mi (2,293.69 km) |
| Irig to Marco de Canavezes | 1,429.82 mi (2,301.07 km) |
| Irig to Marinha Grande | 1,505.11 mi (2,422.24 km) |
| Irig to Massama | 1,550.45 mi (2,495.20 km) |
| Irig to Matosinhos | 1,456.64 mi (2,344.23 km) |
| Irig to Mealhada | 1,464.51 mi (2,356.90 km) |
| Irig to Melgaco | 1,414.35 mi (2,276.18 km) |
| Irig to Melres | 1,444.82 mi (2,325.22 km) |
| Irig to Mira | 1,477.01 mi (2,377.01 km) |
| Irig to Miranda do Corvo | 1,466.35 mi (2,359.86 km) |
| Irig to Mirandela | 1,375.48 mi (2,213.62 km) |
| Irig to Mogadouro | 1,356.36 mi (2,182.85 km) |
| Irig to Moimenta da Beira | 1,408.61 mi (2,266.94 km) |
| Irig to Moita | 1,539.55 mi (2,477.67 km) |
| Irig to Moncao | 1,425.68 mi (2,294.41 km) |
