| Canals to Mangualde | 397.44 mi (639.62 km) |
| Canals to Marco de Canavezes | 428.25 mi (689.21 km) |
| Canals to Marinha Grande | 449.16 mi (722.85 km) |
| Canals to Massama | 467.57 mi (752.48 km) |
| Canals to Matosinhos | 455.49 mi (733.03 km) |
| Canals to Mealhada | 429.50 mi (691.21 km) |
| Canals to Melgaco | 458.26 mi (737.49 km) |
| Canals to Melres | 438.20 mi (705.22 km) |
| Canals to Mira | 444.79 mi (715.81 km) |
| Canals to Miranda do Corvo | 420.20 mi (676.24 km) |
| Canals to Mirandela | 389.12 mi (626.22 km) |
| Canals to Mogadouro | 362.83 mi (583.93 km) |
| Canals to Moimenta da Beira | 397.30 mi (639.40 km) |
| Canals to Moita | 452.54 mi (728.29 km) |
| Canals to Moncao | 466.86 mi (751.33 km) |
