| Martin to Mangualde | 1,422.40 mi (2,289.14 km) |
| Martin to Marco de Canavezes | 1,418.06 mi (2,282.15 km) |
| Martin to Marinha Grande | 1,506.67 mi (2,424.75 km) |
| Martin to Massama | 1,561.33 mi (2,512.72 km) |
| Martin to Matosinhos | 1,442.41 mi (2,321.34 km) |
| Martin to Mealhada | 1,461.04 mi (2,351.31 km) |
| Martin to Melgaco | 1,390.38 mi (2,237.61 km) |
| Martin to Melres | 1,433.36 mi (2,306.78 km) |
| Martin to Mira | 1,471.61 mi (2,368.32 km) |
| Martin to Miranda do Corvo | 1,466.78 mi (2,360.56 km) |
| Martin to Mirandela | 1,364.34 mi (2,195.69 km) |
| Martin to Mogadouro | 1,349.36 mi (2,171.59 km) |
| Martin to Moimenta da Beira | 1,401.86 mi (2,256.07 km) |
| Martin to Moita | 1,553.09 mi (2,499.45 km) |
| Martin to Moncao | 1,401.38 mi (2,255.30 km) |
