| Schwyz to Mangualde | 927.91 mi (1,493.33 km) |
| Schwyz to Marco de Canavezes | 923.36 mi (1,486.00 km) |
| Schwyz to Marinha Grande | 1,012.39 mi (1,629.29 km) |
| Schwyz to Massama | 1,068.13 mi (1,718.99 km) |
| Schwyz to Matosinhos | 947.81 mi (1,525.35 km) |
| Schwyz to Mealhada | 966.46 mi (1,555.37 km) |
| Schwyz to Melgaco | 896.60 mi (1,442.94 km) |
| Schwyz to Melres | 938.66 mi (1,510.63 km) |
| Schwyz to Mira | 976.94 mi (1,572.23 km) |
| Schwyz to Miranda do Corvo | 972.47 mi (1,565.05 km) |
| Schwyz to Mirandela | 869.62 mi (1,399.51 km) |
| Schwyz to Mogadouro | 854.73 mi (1,375.55 km) |
| Schwyz to Moimenta da Beira | 907.19 mi (1,459.99 km) |
| Schwyz to Moita | 1,060.39 mi (1,706.54 km) |
| Schwyz to Moncao | 907.67 mi (1,460.75 km) |
