| Columbia Heights to Mangualde | 4,132.74 mi (6,651.01 km) |
| Columbia Heights to Marco de Canavezes | 4,093.07 mi (6,587.17 km) |
| Columbia Heights to Marinha Grande | 4,116.50 mi (6,624.87 km) |
| Columbia Heights to Massama | 4,141.54 mi (6,665.17 km) |
| Columbia Heights to Matosinhos | 4,069.61 mi (6,549.41 km) |
| Columbia Heights to Mealhada | 4,112.05 mi (6,617.70 km) |
| Columbia Heights to Melgaco | 4,051.37 mi (6,520.05 km) |
| Columbia Heights to Melres | 4,087.03 mi (6,577.44 km) |
| Columbia Heights to Mira | 4,097.88 mi (6,594.90 km) |
| Columbia Heights to Miranda do Corvo | 4,128.39 mi (6,644.01 km) |
| Columbia Heights to Mirandela | 4,122.16 mi (6,633.97 km) |
| Columbia Heights to Mogadouro | 4,147.89 mi (6,675.38 km) |
| Columbia Heights to Moimenta da Beira | 4,124.01 mi (6,636.96 km) |
| Columbia Heights to Moita | 4,158.61 mi (6,692.63 km) |
| Columbia Heights to Moncao | 4,044.05 mi (6,508.27 km) |
