| Soma to Mangualde | 1,864.84 mi (3,001.17 km) |
| Soma to Marco de Canavezes | 1,879.24 mi (3,024.35 km) |
| Soma to Marinha Grande | 1,935.80 mi (3,115.36 km) |
| Soma to Massama | 1,967.62 mi (3,166.58 km) |
| Soma to Matosinhos | 1,907.58 mi (3,069.95 km) |
| Soma to Mealhada | 1,902.98 mi (3,062.56 km) |
| Soma to Melgaco | 1,877.54 mi (3,021.61 km) |
| Soma to Melres | 1,893.24 mi (3,046.87 km) |
| Soma to Mira | 1,917.13 mi (3,085.32 km) |
| Soma to Miranda do Corvo | 1,900.19 mi (3,058.06 km) |
| Soma to Mirandela | 1,826.79 mi (2,939.94 km) |
| Soma to Mogadouro | 1,804.09 mi (2,903.40 km) |
| Soma to Moimenta da Beira | 1,853.47 mi (2,982.88 km) |
| Soma to Moita | 1,953.92 mi (3,144.53 km) |
| Soma to Moncao | 1,888.73 mi (3,039.62 km) |
