| Barking to Mangualde | 842.76 mi (1,356.29 km) |
| Barking to Marco de Canavezes | 814.92 mi (1,311.49 km) |
| Barking to Marinha Grande | 922.04 mi (1,483.88 km) |
| Barking to Massama | 992.06 mi (1,596.57 km) |
| Barking to Matosinhos | 827.70 mi (1,332.05 km) |
| Barking to Mealhada | 871.59 mi (1,402.68 km) |
| Barking to Melgaco | 760.20 mi (1,223.42 km) |
| Barking to Melres | 827.87 mi (1,332.33 km) |
| Barking to Mira | 874.85 mi (1,407.94 km) |
| Barking to Miranda do Corvo | 886.83 mi (1,427.21 km) |
| Barking to Mirandela | 774.88 mi (1,247.05 km) |
| Barking to Mogadouro | 775.11 mi (1,247.43 km) |
| Barking to Moimenta da Beira | 815.91 mi (1,313.09 km) |
| Barking to Moita | 992.51 mi (1,597.30 km) |
| Barking to Moncao | 768.05 mi (1,236.05 km) |
