| Towcester to Mangualde | 858.38 mi (1,381.43 km) |
| Towcester to Marco de Canavezes | 828.09 mi (1,332.69 km) |
| Towcester to Marinha Grande | 935.32 mi (1,505.25 km) |
| Towcester to Massama | 1,005.94 mi (1,618.91 km) |
| Towcester to Matosinhos | 838.96 mi (1,350.18 km) |
| Towcester to Mealhada | 885.29 mi (1,424.73 km) |
| Towcester to Melgaco | 770.89 mi (1,240.62 km) |
| Towcester to Melres | 840.41 mi (1,352.51 km) |
| Towcester to Mira | 887.52 mi (1,428.33 km) |
| Towcester to Miranda do Corvo | 901.42 mi (1,450.70 km) |
| Towcester to Mirandela | 790.91 mi (1,272.84 km) |
| Towcester to Mogadouro | 793.13 mi (1,276.41 km) |
| Towcester to Moimenta da Beira | 831.36 mi (1,337.94 km) |
| Towcester to Moita | 1,007.44 mi (1,621.31 km) |
| Towcester to Moncao | 778.07 mi (1,252.18 km) |
