| Milford Haven to Mangualde | 778.43 mi (1,252.76 km) |
| Milford Haven to Marco de Canavezes | 742.32 mi (1,194.64 km) |
| Milford Haven to Marinha Grande | 847.36 mi (1,363.69 km) |
| Milford Haven to Massama | 918.24 mi (1,477.76 km) |
| Milford Haven to Matosinhos | 747.90 mi (1,203.64 km) |
| Milford Haven to Mealhada | 799.52 mi (1,286.71 km) |
| Milford Haven to Melgaco | 680.18 mi (1,094.64 km) |
| Milford Haven to Melres | 752.65 mi (1,211.28 km) |
| Milford Haven to Mira | 798.98 mi (1,285.84 km) |
| Milford Haven to Miranda do Corvo | 817.69 mi (1,315.94 km) |
| Milford Haven to Mirandela | 713.92 mi (1,148.95 km) |
| Milford Haven to Mogadouro | 721.60 mi (1,161.30 km) |
| Milford Haven to Moimenta da Beira | 751.62 mi (1,209.62 km) |
| Milford Haven to Moita | 922.47 mi (1,484.57 km) |
| Milford Haven to Moncao | 685.40 mi (1,103.05 km) |
