| Clydebank to Mangualde | 1,067.75 mi (1,718.37 km) |
| Clydebank to Marco de Canavezes | 1,030.78 mi (1,658.89 km) |
| Clydebank to Marinha Grande | 1,134.87 mi (1,826.39 km) |
| Clydebank to Massama | 1,205.51 mi (1,940.09 km) |
| Clydebank to Matosinhos | 1,035.15 mi (1,665.91 km) |
| Clydebank to Mealhada | 1,087.74 mi (1,750.56 km) |
| Clydebank to Melgaco | 967.91 mi (1,557.71 km) |
| Clydebank to Melres | 1,040.66 mi (1,674.78 km) |
| Clydebank to Mira | 1,086.58 mi (1,748.68 km) |
| Clydebank to Miranda do Corvo | 1,106.24 mi (1,780.32 km) |
| Clydebank to Mirandela | 1,003.77 mi (1,615.42 km) |
| Clydebank to Mogadouro | 1,011.84 mi (1,628.40 km) |
| Clydebank to Moimenta da Beira | 1,041.05 mi (1,675.41 km) |
| Clydebank to Moita | 1,210.39 mi (1,947.93 km) |
| Clydebank to Moncao | 972.62 mi (1,565.29 km) |
