| Acton to Mangualde | 833.89 mi (1,342.02 km) |
| Acton to Marco de Canavezes | 805.54 mi (1,296.39 km) |
| Acton to Marinha Grande | 912.72 mi (1,468.88 km) |
| Acton to Massama | 982.88 mi (1,581.80 km) |
| Acton to Matosinhos | 817.94 mi (1,316.34 km) |
| Acton to Mealhada | 862.33 mi (1,387.79 km) |
| Acton to Melgaco | 750.30 mi (1,207.49 km) |
| Acton to Melres | 818.36 mi (1,317.03 km) |
| Acton to Mira | 865.39 mi (1,392.71 km) |
| Acton to Miranda do Corvo | 877.76 mi (1,412.62 km) |
| Acton to Mirandela | 766.07 mi (1,232.87 km) |
| Acton to Mogadouro | 766.73 mi (1,233.94 km) |
| Acton to Moimenta da Beira | 807.00 mi (1,298.74 km) |
| Acton to Moita | 983.55 mi (1,582.87 km) |
| Acton to Moncao | 758.02 mi (1,219.91 km) |
