| Blaydon to Mangualde | 1,030.04 mi (1,657.69 km) |
| Blaydon to Marco de Canavezes | 996.27 mi (1,603.34 km) |
| Blaydon to Marinha Grande | 1,102.60 mi (1,774.47 km) |
| Blaydon to Massama | 1,173.62 mi (1,888.75 km) |
| Blaydon to Matosinhos | 1,003.94 mi (1,615.68 km) |
| Blaydon to Mealhada | 1,053.72 mi (1,695.80 km) |
| Blaydon to Melgaco | 935.77 mi (1,505.97 km) |
| Blaydon to Melres | 1,007.45 mi (1,621.33 km) |
| Blaydon to Mira | 1,054.28 mi (1,696.69 km) |
| Blaydon to Miranda do Corvo | 1,071.12 mi (1,723.79 km) |
| Blaydon to Mirandela | 963.84 mi (1,551.14 km) |
| Blaydon to Mogadouro | 968.87 mi (1,559.25 km) |
| Blaydon to Moimenta da Beira | 1,003.01 mi (1,614.19 km) |
| Blaydon to Moita | 1,176.78 mi (1,893.84 km) |
| Blaydon to Moncao | 941.74 mi (1,515.59 km) |
