| Grootegast to Marco de Canavezes | 1,068.39 mi (1,719.41 km) |
| Grootegast to Marinha Grande | 1,173.77 mi (1,889.00 km) |
| Grootegast to Massama | 1,241.67 mi (1,998.27 km) |
| Grootegast to Matosinhos | 1,084.58 mi (1,745.46 km) |
| Grootegast to Mealhada | 1,123.15 mi (1,807.53 km) |
| Grootegast to Melgaco | 1,019.10 mi (1,640.08 km) |
| Grootegast to Melres | 1,082.36 mi (1,741.88 km) |
| Grootegast to Mira | 1,128.42 mi (1,816.02 km) |
| Grootegast to Miranda do Corvo | 1,136.32 mi (1,828.73 km) |
| Grootegast to Mirandela | 1,023.23 mi (1,646.73 km) |
| Grootegast to Mogadouro | 1,019.14 mi (1,640.15 km) |
| Grootegast to Moimenta da Beira | 1,064.75 mi (1,713.55 km) |
| Grootegast to Moita | 1,239.88 mi (1,995.39 km) |
| Grootegast to Moncao | 1,028.00 mi (1,654.40 km) |
| Grootegast to Montalegre | 1,021.44 mi (1,643.85 km) |
