| Plainview to Mangualde | 3,356.52 mi (5,401.80 km) |
| Plainview to Marco de Canavezes | 3,322.34 mi (5,346.79 km) |
| Plainview to Marinha Grande | 3,322.82 mi (5,347.56 km) |
| Plainview to Massama | 3,333.57 mi (5,364.87 km) |
| Plainview to Matosinhos | 3,295.88 mi (5,304.20 km) |
| Plainview to Mealhada | 3,329.15 mi (5,357.76 km) |
| Plainview to Melgaco | 3,292.62 mi (5,298.96 km) |
| Plainview to Melres | 3,313.38 mi (5,332.37 km) |
| Plainview to Mira | 3,314.08 mi (5,333.49 km) |
| Plainview to Miranda do Corvo | 3,342.49 mi (5,379.21 km) |
| Plainview to Mirandela | 3,360.79 mi (5,408.67 km) |
| Plainview to Mogadouro | 3,387.08 mi (5,450.97 km) |
| Plainview to Moimenta da Beira | 3,353.54 mi (5,397.00 km) |
| Plainview to Moita | 3,350.94 mi (5,392.81 km) |
| Plainview to Moncao | 3,283.55 mi (5,284.36 km) |
