| Palm River-Clair Mel to Mangualde | 4,224.14 mi (6,798.09 km) |
| Palm River-Clair Mel to Marco de Canavezes | 4,195.26 mi (6,751.62 km) |
| Palm River-Clair Mel to Marinha Grande | 4,177.51 mi (6,723.05 km) |
| Palm River-Clair Mel to Massama | 4,175.65 mi (6,720.06 km) |
| Palm River-Clair Mel to Matosinhos | 4,167.36 mi (6,706.72 km) |
| Palm River-Clair Mel to Mealhada | 4,192.41 mi (6,747.03 km) |
| Palm River-Clair Mel to Melgaco | 4,175.33 mi (6,719.55 km) |
| Palm River-Clair Mel to Melres | 4,184.36 mi (6,734.08 km) |
| Palm River-Clair Mel to Mira | 4,177.11 mi (6,722.41 km) |
| Palm River-Clair Mel to Miranda do Corvo | 4,202.89 mi (6,763.89 km) |
| Palm River-Clair Mel to Mirandela | 4,239.48 mi (6,822.78 km) |
| Palm River-Clair Mel to Mogadouro | 4,265.36 mi (6,864.43 km) |
| Palm River-Clair Mel to Moimenta da Beira | 4,225.66 mi (6,800.53 km) |
| Palm River-Clair Mel to Moita | 4,192.67 mi (6,747.45 km) |
| Palm River-Clair Mel to Moncao | 4,165.28 mi (6,703.37 km) |
