| Madison to Mangualde | 4,029.18 mi (6,484.34 km) |
| Madison to Marco de Canavezes | 3,990.90 mi (6,422.73 km) |
| Madison to Marinha Grande | 4,007.79 mi (6,449.92 km) |
| Madison to Massama | 4,028.74 mi (6,483.63 km) |
| Madison to Matosinhos | 3,966.46 mi (6,383.40 km) |
| Madison to Mealhada | 4,006.46 mi (6,447.78 km) |
| Madison to Melgaco | 3,952.39 mi (6,360.77 km) |
| Madison to Melres | 3,983.99 mi (6,411.61 km) |
| Madison to Mira | 3,991.96 mi (6,424.44 km) |
| Madison to Miranda do Corvo | 4,022.01 mi (6,472.80 km) |
| Madison to Mirandela | 4,022.80 mi (6,474.08 km) |
| Madison to Mogadouro | 4,048.82 mi (6,515.94 km) |
| Madison to Moimenta da Beira | 4,022.06 mi (6,472.89 km) |
| Madison to Moita | 4,045.97 mi (6,511.35 km) |
| Madison to Moncao | 3,944.54 mi (6,348.12 km) |
