| Aberystwyth to Mangualde | 834.25 mi (1,342.59 km) |
| Aberystwyth to Marco de Canavezes | 799.14 mi (1,286.10 km) |
| Aberystwyth to Marinha Grande | 904.85 mi (1,456.21 km) |
| Aberystwyth to Massama | 975.83 mi (1,570.44 km) |
| Aberystwyth to Matosinhos | 805.71 mi (1,296.66 km) |
| Aberystwyth to Mealhada | 856.51 mi (1,378.41 km) |
| Aberystwyth to Melgaco | 737.72 mi (1,187.25 km) |
| Aberystwyth to Melres | 809.88 mi (1,303.37 km) |
| Aberystwyth to Mira | 856.47 mi (1,378.35 km) |
| Aberystwyth to Miranda do Corvo | 874.34 mi (1,407.11 km) |
| Aberystwyth to Mirandela | 768.94 mi (1,237.49 km) |
| Aberystwyth to Mogadouro | 775.52 mi (1,248.08 km) |
| Aberystwyth to Moimenta da Beira | 807.32 mi (1,299.25 km) |
| Aberystwyth to Moita | 979.57 mi (1,576.47 km) |
| Aberystwyth to Moncao | 743.31 mi (1,196.25 km) |
