| Montmelo to Mangualde | 525.22 mi (845.26 km) |
| Montmelo to Marco de Canavezes | 539.55 mi (868.32 km) |
| Montmelo to Marinha Grande | 598.87 mi (963.79 km) |
| Montmelo to Massama | 637.97 mi (1,026.72 km) |
| Montmelo to Matosinhos | 567.98 mi (914.08 km) |
| Montmelo to Mealhada | 563.68 mi (907.15 km) |
| Montmelo to Melgaco | 542.43 mi (872.96 km) |
| Montmelo to Melres | 553.40 mi (890.61 km) |
| Montmelo to Mira | 577.59 mi (929.55 km) |
| Montmelo to Miranda do Corvo | 561.99 mi (904.43 km) |
| Montmelo to Mirandela | 487.70 mi (784.88 km) |
| Montmelo to Mogadouro | 464.45 mi (747.46 km) |
| Montmelo to Moimenta da Beira | 513.51 mi (826.41 km) |
| Montmelo to Moita | 626.11 mi (1,007.63 km) |
| Montmelo to Moncao | 553.35 mi (890.53 km) |
