| Gourock to Mangualde | 1,068.91 mi (1,720.25 km) |
| Gourock to Marco de Canavezes | 1,031.55 mi (1,660.12 km) |
| Gourock to Marinha Grande | 1,135.22 mi (1,826.96 km) |
| Gourock to Massama | 1,205.75 mi (1,940.47 km) |
| Gourock to Matosinhos | 1,035.45 mi (1,666.40 km) |
| Gourock to Mealhada | 1,088.38 mi (1,751.58 km) |
| Gourock to Melgaco | 968.43 mi (1,558.53 km) |
| Gourock to Melres | 1,041.23 mi (1,675.70 km) |
| Gourock to Mira | 1,086.99 mi (1,749.33 km) |
| Gourock to Miranda do Corvo | 1,107.01 mi (1,781.56 km) |
| Gourock to Mirandela | 1,005.32 mi (1,617.90 km) |
| Gourock to Mogadouro | 1,013.79 mi (1,631.55 km) |
| Gourock to Moimenta da Beira | 1,042.29 mi (1,677.41 km) |
| Gourock to Moita | 1,210.86 mi (1,948.69 km) |
| Gourock to Moncao | 972.96 mi (1,565.83 km) |
