| Marshfield to Mangualde | 4,012.64 mi (6,457.72 km) |
| Marshfield to Marco de Canavezes | 3,973.58 mi (6,394.86 km) |
| Marshfield to Marinha Grande | 3,994.10 mi (6,427.88 km) |
| Marshfield to Massama | 4,017.36 mi (6,465.31 km) |
| Marshfield to Matosinhos | 3,949.67 mi (6,356.37 km) |
| Marshfield to Mealhada | 3,991.03 mi (6,422.94 km) |
| Marshfield to Melgaco | 3,933.31 mi (6,330.05 km) |
| Marshfield to Melres | 3,967.14 mi (6,384.50 km) |
| Marshfield to Mira | 3,976.70 mi (6,399.88 km) |
| Marshfield to Miranda do Corvo | 4,007.03 mi (6,448.69 km) |
| Marshfield to Mirandela | 4,003.96 mi (6,443.75 km) |
| Marshfield to Mogadouro | 4,029.83 mi (6,485.39 km) |
| Marshfield to Moimenta da Beira | 4,004.64 mi (6,444.84 km) |
| Marshfield to Moita | 4,034.50 mi (6,492.90 km) |
| Marshfield to Moncao | 3,925.74 mi (6,317.87 km) |
