| Penwortham to Mangualde | 937.37 mi (1,508.56 km) |
| Penwortham to Marco de Canavezes | 903.24 mi (1,453.62 km) |
| Penwortham to Marinha Grande | 1,009.43 mi (1,624.52 km) |
| Penwortham to Massama | 1,080.44 mi (1,738.80 km) |
| Penwortham to Matosinhos | 910.64 mi (1,465.53 km) |
| Penwortham to Mealhada | 960.67 mi (1,546.06 km) |
| Penwortham to Melgaco | 842.50 mi (1,355.88 km) |
| Penwortham to Melres | 914.31 mi (1,471.43 km) |
| Penwortham to Mira | 961.08 mi (1,546.71 km) |
| Penwortham to Miranda do Corvo | 978.19 mi (1,574.24 km) |
| Penwortham to Mirandela | 871.41 mi (1,402.39 km) |
| Penwortham to Mogadouro | 876.90 mi (1,411.23 km) |
| Penwortham to Moimenta da Beira | 910.36 mi (1,465.09 km) |
| Penwortham to Moita | 1,083.75 mi (1,744.13 km) |
| Penwortham to Moncao | 848.39 mi (1,365.35 km) |
