| Box Elder to Mangualde | 4,578.62 mi (7,368.58 km) |
| Box Elder to Marco de Canavezes | 4,537.83 mi (7,302.93 km) |
| Box Elder to Marinha Grande | 4,567.00 mi (7,349.88 km) |
| Box Elder to Massama | 4,595.47 mi (7,395.69 km) |
| Box Elder to Matosinhos | 4,515.34 mi (7,266.74 km) |
| Box Elder to Mealhada | 4,559.82 mi (7,338.32 km) |
| Box Elder to Melgaco | 4,493.31 mi (7,231.28 km) |
| Box Elder to Melres | 4,532.60 mi (7,294.51 km) |
| Box Elder to Mira | 4,545.99 mi (7,316.07 km) |
| Box Elder to Miranda do Corvo | 4,576.82 mi (7,365.69 km) |
| Box Elder to Mirandela | 4,564.20 mi (7,345.38 km) |
| Box Elder to Mogadouro | 4,589.57 mi (7,386.20 km) |
| Box Elder to Moimenta da Beira | 4,568.46 mi (7,352.22 km) |
| Box Elder to Moita | 4,612.35 mi (7,422.85 km) |
| Box Elder to Moncao | 4,486.51 mi (7,220.35 km) |
