| Groningen to Marco de Canavezes | 1,076.69 mi (1,732.76 km) |
| Groningen to Marinha Grande | 1,181.92 mi (1,902.11 km) |
| Groningen to Massama | 1,249.66 mi (2,011.14 km) |
| Groningen to Matosinhos | 1,093.06 mi (1,759.10 km) |
| Groningen to Mealhada | 1,131.31 mi (1,820.66 km) |
| Groningen to Melgaco | 1,027.73 mi (1,653.97 km) |
| Groningen to Melres | 1,090.70 mi (1,755.32 km) |
| Groningen to Mira | 1,136.69 mi (1,829.33 km) |
| Groningen to Miranda do Corvo | 1,144.36 mi (1,841.67 km) |
| Groningen to Mirandela | 1,031.28 mi (1,659.69 km) |
| Groningen to Mogadouro | 1,026.97 mi (1,652.75 km) |
| Groningen to Moimenta da Beira | 1,072.80 mi (1,726.51 km) |
| Groningen to Moita | 1,247.75 mi (2,008.06 km) |
| Groningen to Moncao | 1,036.68 mi (1,668.37 km) |
| Groningen to Montalegre | 1,029.82 mi (1,657.33 km) |
