| Truro to Mangualde | 679.84 mi (1,094.10 km) |
| Truro to Marco de Canavezes | 644.56 mi (1,037.31 km) |
| Truro to Marinha Grande | 750.26 mi (1,207.42 km) |
| Truro to Massama | 821.24 mi (1,321.66 km) |
| Truro to Matosinhos | 651.16 mi (1,047.94 km) |
| Truro to Mealhada | 701.91 mi (1,129.61 km) |
| Truro to Melgaco | 583.15 mi (938.48 km) |
| Truro to Melres | 655.28 mi (1,054.57 km) |
| Truro to Mira | 701.88 mi (1,129.56 km) |
| Truro to Miranda do Corvo | 719.77 mi (1,158.36 km) |
| Truro to Mirandela | 614.81 mi (989.43 km) |
| Truro to Mogadouro | 621.93 mi (1,000.90 km) |
| Truro to Moimenta da Beira | 652.95 mi (1,050.82 km) |
| Truro to Moita | 824.98 mi (1,327.67 km) |
| Truro to Moncao | 588.79 mi (947.57 km) |
