| Valls to Mangualde | 472.46 mi (760.36 km) |
| Valls to Marco de Canavezes | 488.27 mi (785.79 km) |
| Valls to Marinha Grande | 545.02 mi (877.13 km) |
| Valls to Massama | 583.30 mi (938.73 km) |
| Valls to Matosinhos | 516.80 mi (831.70 km) |
| Valls to Mealhada | 510.68 mi (821.85 km) |
| Valls to Melgaco | 494.03 mi (795.06 km) |
| Valls to Melres | 501.86 mi (807.67 km) |
| Valls to Mira | 524.76 mi (844.52 km) |
| Valls to Miranda do Corvo | 508.47 mi (818.31 km) |
| Valls to Mirandela | 437.16 mi (703.55 km) |
| Valls to Mogadouro | 413.37 mi (665.25 km) |
| Valls to Moimenta da Beira | 461.59 mi (742.85 km) |
| Valls to Moita | 571.33 mi (919.47 km) |
| Valls to Moncao | 504.78 mi (812.37 km) |
