| Abertillery to Mangualde | 799.60 mi (1,286.84 km) |
| Abertillery to Marco de Canavezes | 766.41 mi (1,233.42 km) |
| Abertillery to Marinha Grande | 873.06 mi (1,405.06 km) |
| Abertillery to Massama | 944.05 mi (1,519.30 km) |
| Abertillery to Matosinhos | 774.86 mi (1,247.02 km) |
| Abertillery to Mealhada | 823.87 mi (1,325.89 km) |
| Abertillery to Melgaco | 706.61 mi (1,137.19 km) |
| Abertillery to Melres | 777.86 mi (1,251.85 km) |
| Abertillery to Mira | 824.81 mi (1,327.41 km) |
| Abertillery to Miranda do Corvo | 841.03 mi (1,353.51 km) |
| Abertillery to Mirandela | 733.20 mi (1,179.98 km) |
| Abertillery to Mogadouro | 738.06 mi (1,187.79 km) |
| Abertillery to Moimenta da Beira | 772.55 mi (1,243.30 km) |
| Abertillery to Moita | 946.85 mi (1,523.80 km) |
| Abertillery to Moncao | 712.93 mi (1,147.35 km) |
