| Maryland Heights to Mangualde | 4,226.40 mi (6,801.73 km) |
| Maryland Heights to Marco de Canavezes | 4,189.81 mi (6,742.85 km) |
| Maryland Heights to Marinha Grande | 4,199.31 mi (6,758.13 km) |
| Maryland Heights to Massama | 4,215.40 mi (6,784.03 km) |
| Maryland Heights to Matosinhos | 4,164.41 mi (6,701.97 km) |
| Maryland Heights to Mealhada | 4,201.52 mi (6,761.69 km) |
| Maryland Heights to Melgaco | 4,154.96 mi (6,686.76 km) |
| Maryland Heights to Melres | 4,181.98 mi (6,730.24 km) |
| Maryland Heights to Mira | 4,186.71 mi (6,737.86 km) |
| Maryland Heights to Miranda do Corvo | 4,216.10 mi (6,785.16 km) |
| Maryland Heights to Mirandela | 4,224.64 mi (6,798.90 km) |
| Maryland Heights to Mogadouro | 4,250.85 mi (6,841.08 km) |
| Maryland Heights to Moimenta da Beira | 4,221.08 mi (6,793.18 km) |
| Maryland Heights to Moita | 4,232.74 mi (6,811.94 km) |
| Maryland Heights to Moncao | 4,146.56 mi (6,673.25 km) |
