| Grangemouth to Mangualde | 1,080.21 mi (1,738.43 km) |
| Grangemouth to Marco de Canavezes | 1,043.86 mi (1,679.92 km) |
| Grangemouth to Marinha Grande | 1,148.49 mi (1,848.32 km) |
| Grangemouth to Massama | 1,219.27 mi (1,962.23 km) |
| Grangemouth to Matosinhos | 1,048.88 mi (1,688.01 km) |
| Grangemouth to Mealhada | 1,100.97 mi (1,771.85 km) |
| Grangemouth to Melgaco | 981.38 mi (1,579.38 km) |
| Grangemouth to Melres | 1,054.00 mi (1,696.25 km) |
| Grangemouth to Mira | 1,100.15 mi (1,770.52 km) |
| Grangemouth to Miranda do Corvo | 1,119.27 mi (1,801.29 km) |
| Grangemouth to Mirandela | 1,015.71 mi (1,634.62 km) |
| Grangemouth to Mogadouro | 1,023.15 mi (1,646.60 km) |
| Grangemouth to Moimenta da Beira | 1,053.42 mi (1,695.31 km) |
| Grangemouth to Moita | 1,223.81 mi (1,969.53 km) |
| Grangemouth to Moncao | 986.35 mi (1,587.37 km) |
