| Triangle to Mangualde | 3,606.41 mi (5,803.96 km) |
| Triangle to Marco de Canavezes | 3,572.77 mi (5,749.82 km) |
| Triangle to Marinha Grande | 3,571.16 mi (5,747.23 km) |
| Triangle to Massama | 3,580.39 mi (5,762.08 km) |
| Triangle to Matosinhos | 3,546.11 mi (5,706.92 km) |
| Triangle to Mealhada | 3,578.51 mi (5,759.06 km) |
| Triangle to Melgaco | 3,544.05 mi (5,703.59 km) |
| Triangle to Melres | 3,563.58 mi (5,735.04 km) |
| Triangle to Mira | 3,563.39 mi (5,734.72 km) |
| Triangle to Miranda do Corvo | 3,591.54 mi (5,780.02 km) |
| Triangle to Mirandela | 3,611.89 mi (5,812.77 km) |
| Triangle to Mogadouro | 3,638.16 mi (5,855.05 km) |
| Triangle to Moimenta da Beira | 3,603.92 mi (5,799.95 km) |
| Triangle to Moita | 3,597.74 mi (5,790.00 km) |
| Triangle to Moncao | 3,534.86 mi (5,688.81 km) |
