| Fort Oglethorpe to Mangualde | 4,111.02 mi (6,616.04 km) |
| Fort Oglethorpe to Marco de Canavezes | 4,077.46 mi (6,562.04 km) |
| Fort Oglethorpe to Marinha Grande | 4,075.33 mi (6,558.61 km) |
| Fort Oglethorpe to Massama | 4,083.91 mi (6,572.42 km) |
| Fort Oglethorpe to Matosinhos | 4,050.78 mi (6,519.10 km) |
| Fort Oglethorpe to Mealhada | 4,082.99 mi (6,570.94 km) |
| Fort Oglethorpe to Melgaco | 4,048.79 mi (6,515.90 km) |
| Fort Oglethorpe to Melres | 4,068.24 mi (6,547.21 km) |
| Fort Oglethorpe to Mira | 4,067.86 mi (6,546.59 km) |
| Fort Oglethorpe to Miranda do Corvo | 4,095.93 mi (6,591.77 km) |
| Fort Oglethorpe to Mirandela | 4,116.63 mi (6,625.08 km) |
| Fort Oglethorpe to Mogadouro | 4,142.90 mi (6,667.36 km) |
| Fort Oglethorpe to Moimenta da Beira | 4,108.61 mi (6,612.16 km) |
| Fort Oglethorpe to Moita | 4,101.25 mi (6,600.33 km) |
| Fort Oglethorpe to Moncao | 4,039.61 mi (6,501.12 km) |
