| Largo to Mangualde | 4,244.71 mi (6,831.20 km) |
| Largo to Marco de Canavezes | 4,215.71 mi (6,784.53 km) |
| Largo to Marinha Grande | 4,198.33 mi (6,756.56 km) |
| Largo to Massama | 4,196.71 mi (6,753.96 km) |
| Largo to Matosinhos | 4,187.84 mi (6,739.67 km) |
| Largo to Mealhada | 4,213.06 mi (6,780.27 km) |
| Largo to Melgaco | 4,195.56 mi (6,752.09 km) |
| Largo to Melres | 4,204.85 mi (6,767.06 km) |
| Largo to Mira | 4,197.76 mi (6,755.65 km) |
| Largo to Miranda do Corvo | 4,223.60 mi (6,797.23 km) |
| Largo to Mirandela | 4,259.81 mi (6,855.51 km) |
| Largo to Mogadouro | 4,285.71 mi (6,897.18 km) |
| Largo to Moimenta da Beira | 4,246.13 mi (6,833.49 km) |
| Largo to Moita | 4,213.74 mi (6,781.36 km) |
| Largo to Moncao | 4,185.52 mi (6,735.95 km) |
