| Wellingborough to Mangualde | 873.89 mi (1,406.39 km) |
| Wellingborough to Marco de Canavezes | 843.84 mi (1,358.03 km) |
| Wellingborough to Marinha Grande | 951.08 mi (1,530.62 km) |
| Wellingborough to Massama | 1,021.66 mi (1,644.20 km) |
| Wellingborough to Matosinhos | 854.89 mi (1,375.81 km) |
| Wellingborough to Mealhada | 901.00 mi (1,450.02 km) |
| Wellingborough to Melgaco | 786.85 mi (1,266.32 km) |
| Wellingborough to Melres | 856.23 mi (1,377.96 km) |
| Wellingborough to Mira | 903.34 mi (1,453.78 km) |
| Wellingborough to Miranda do Corvo | 917.05 mi (1,475.85 km) |
| Wellingborough to Mirandela | 806.35 mi (1,297.70 km) |
| Wellingborough to Mogadouro | 808.34 mi (1,300.90 km) |
| Wellingborough to Moimenta da Beira | 846.88 mi (1,362.91 km) |
| Wellingborough to Moita | 1,023.05 mi (1,646.44 km) |
| Wellingborough to Moncao | 794.09 mi (1,277.96 km) |
