| Duluth to Mangualde | 4,029.49 mi (6,484.84 km) |
| Duluth to Marco de Canavezes | 3,989.34 mi (6,420.22 km) |
| Duluth to Marinha Grande | 4,015.27 mi (6,461.95 km) |
| Duluth to Massama | 4,041.94 mi (6,504.88 km) |
| Duluth to Matosinhos | 3,966.28 mi (6,383.10 km) |
| Duluth to Mealhada | 4,009.60 mi (6,452.82 km) |
| Duluth to Melgaco | 3,946.49 mi (6,351.26 km) |
| Duluth to Melres | 3,983.63 mi (6,411.04 km) |
| Duluth to Mira | 3,995.57 mi (6,430.25 km) |
| Duluth to Miranda do Corvo | 4,026.24 mi (6,479.60 km) |
| Duluth to Mirandela | 4,017.35 mi (6,465.30 km) |
| Duluth to Mogadouro | 4,042.95 mi (6,506.49 km) |
| Duluth to Moimenta da Beira | 4,020.17 mi (6,469.83 km) |
| Duluth to Moita | 4,058.92 mi (6,532.20 km) |
| Duluth to Moncao | 3,939.37 mi (6,339.80 km) |
