| San Juan to Mangualde | 3,749.64 mi (6,034.47 km) |
| San Juan to Marco de Canavezes | 3,733.88 mi (6,009.10 km) |
| San Juan to Marinha Grande | 3,681.84 mi (5,925.34 km) |
| San Juan to Massama | 3,656.54 mi (5,884.64 km) |
| San Juan to Matosinhos | 3,705.49 mi (5,963.41 km) |
| San Juan to Mealhada | 3,712.02 mi (5,973.91 km) |
| San Juan to Melgaco | 3,735.84 mi (6,012.26 km) |
| San Juan to Melres | 3,720.01 mi (5,986.78 km) |
| San Juan to Mira | 3,697.59 mi (5,950.70 km) |
| San Juan to Miranda do Corvo | 3,716.03 mi (5,980.37 km) |
| San Juan to Mirandela | 3,786.14 mi (6,093.21 km) |
| San Juan to Mogadouro | 3,809.01 mi (6,130.01 km) |
| San Juan to Moimenta da Beira | 3,760.07 mi (6,051.24 km) |
| San Juan to Moita | 3,671.47 mi (5,908.66 km) |
| San Juan to Moncao | 3,724.61 mi (5,994.18 km) |
