| Riverbank to Mangualde | 5,574.88 mi (8,971.90 km) |
| Riverbank to Marco de Canavezes | 5,532.90 mi (8,904.34 km) |
| Riverbank to Marinha Grande | 5,568.77 mi (8,962.08 km) |
| Riverbank to Massama | 5,601.06 mi (9,014.04 km) |
| Riverbank to Matosinhos | 5,511.68 mi (8,870.19 km) |
| Riverbank to Mealhada | 5,558.41 mi (8,945.40 km) |
| Riverbank to Melgaco | 5,485.15 mi (8,827.50 km) |
| Riverbank to Melres | 5,528.67 mi (8,897.53 km) |
| Riverbank to Mira | 5,545.04 mi (8,923.88 km) |
| Riverbank to Miranda do Corvo | 5,576.13 mi (8,973.91 km) |
| Riverbank to Mirandela | 5,555.84 mi (8,941.25 km) |
| Riverbank to Mogadouro | 5,580.64 mi (8,981.16 km) |
| Riverbank to Moimenta da Beira | 5,563.01 mi (8,952.80 km) |
| Riverbank to Moita | 5,617.68 mi (9,040.78 km) |
| Riverbank to Moncao | 5,479.03 mi (8,817.65 km) |
