| Smethwick to Mangualde | 865.63 mi (1,393.09 km) |
| Smethwick to Marco de Canavezes | 833.50 mi (1,341.39 km) |
| Smethwick to Marinha Grande | 940.45 mi (1,513.51 km) |
| Smethwick to Massama | 1,011.35 mi (1,627.62 km) |
| Smethwick to Matosinhos | 842.82 mi (1,356.38 km) |
| Smethwick to Mealhada | 890.91 mi (1,433.79 km) |
| Smethwick to Melgaco | 774.56 mi (1,246.54 km) |
| Smethwick to Melres | 845.27 mi (1,360.34 km) |
| Smethwick to Mira | 892.32 mi (1,436.05 km) |
| Smethwick to Miranda do Corvo | 907.71 mi (1,460.82 km) |
| Smethwick to Mirandela | 798.73 mi (1,285.44 km) |
| Smethwick to Mogadouro | 802.52 mi (1,291.54 km) |
| Smethwick to Moimenta da Beira | 838.56 mi (1,349.53 km) |
| Smethwick to Moita | 1,013.68 mi (1,631.36 km) |
| Smethwick to Moncao | 781.18 mi (1,257.19 km) |
