| Rock Ferry to Mangualde | 909.72 mi (1,464.05 km) |
| Rock Ferry to Marco de Canavezes | 875.46 mi (1,408.92 km) |
| Rock Ferry to Marinha Grande | 981.60 mi (1,579.73 km) |
| Rock Ferry to Massama | 1,052.61 mi (1,694.02 km) |
| Rock Ferry to Matosinhos | 882.77 mi (1,420.69 km) |
| Rock Ferry to Mealhada | 932.89 mi (1,501.34 km) |
| Rock Ferry to Melgaco | 814.65 mi (1,311.05 km) |
| Rock Ferry to Melres | 886.49 mi (1,426.67 km) |
| Rock Ferry to Mira | 933.25 mi (1,501.92 km) |
| Rock Ferry to Miranda do Corvo | 950.44 mi (1,529.59 km) |
| Rock Ferry to Mirandela | 843.84 mi (1,358.02 km) |
| Rock Ferry to Mogadouro | 849.48 mi (1,367.11 km) |
| Rock Ferry to Moimenta da Beira | 882.72 mi (1,420.60 km) |
| Rock Ferry to Moita | 1,055.97 mi (1,699.42 km) |
| Rock Ferry to Moncao | 820.51 mi (1,320.48 km) |
