| Porthcawl to Mangualde | 776.08 mi (1,248.98 km) |
| Porthcawl to Marco de Canavezes | 742.21 mi (1,194.47 km) |
| Porthcawl to Marinha Grande | 848.60 mi (1,365.68 km) |
| Porthcawl to Massama | 919.61 mi (1,479.96 km) |
| Porthcawl to Matosinhos | 750.06 mi (1,207.10 km) |
| Porthcawl to Mealhada | 799.66 mi (1,286.93 km) |
| Porthcawl to Melgaco | 681.85 mi (1,097.33 km) |
| Porthcawl to Melres | 753.43 mi (1,212.52 km) |
| Porthcawl to Mira | 800.28 mi (1,287.93 km) |
| Porthcawl to Miranda do Corvo | 817.06 mi (1,314.93 km) |
| Porthcawl to Mirandela | 710.05 mi (1,142.71 km) |
| Porthcawl to Mogadouro | 715.58 mi (1,151.61 km) |
| Porthcawl to Moimenta da Beira | 749.06 mi (1,205.50 km) |
| Porthcawl to Moita | 922.72 mi (1,484.97 km) |
| Porthcawl to Moncao | 687.95 mi (1,107.14 km) |
