| Wells to Mangualde | 772.45 mi (1,243.13 km) |
| Wells to Marco de Canavezes | 740.55 mi (1,191.80 km) |
| Wells to Marinha Grande | 847.57 mi (1,364.04 km) |
| Wells to Massama | 918.44 mi (1,478.09 km) |
| Wells to Matosinhos | 750.19 mi (1,207.32 km) |
| Wells to Mealhada | 797.94 mi (1,284.17 km) |
| Wells to Melgaco | 681.96 mi (1,097.51 km) |
| Wells to Melres | 752.43 mi (1,210.92 km) |
| Wells to Mira | 799.50 mi (1,286.67 km) |
| Wells to Miranda do Corvo | 814.64 mi (1,311.04 km) |
| Wells to Mirandela | 705.50 mi (1,135.39 km) |
| Wells to Mogadouro | 709.25 mi (1,141.43 km) |
| Wells to Moimenta da Beira | 745.38 mi (1,199.57 km) |
| Wells to Moita | 920.63 mi (1,481.62 km) |
| Wells to Moncao | 688.72 mi (1,108.39 km) |
