| Grunheide to Marco de Canavezes | 1,288.76 mi (2,074.07 km) |
| Grunheide to Marinha Grande | 1,388.31 mi (2,234.27 km) |
| Grunheide to Massama | 1,451.19 mi (2,335.47 km) |
| Grunheide to Matosinhos | 1,309.25 mi (2,107.04 km) |
| Grunheide to Mealhada | 1,339.03 mi (2,154.97 km) |
| Grunheide to Melgaco | 1,248.81 mi (2,009.76 km) |
| Grunheide to Melres | 1,303.69 mi (2,098.09 km) |
| Grunheide to Mira | 1,346.98 mi (2,167.75 km) |
| Grunheide to Miranda do Corvo | 1,348.90 mi (2,170.84 km) |
| Grunheide to Mirandela | 1,238.35 mi (1,992.93 km) |
| Grunheide to Mogadouro | 1,228.80 mi (1,977.56 km) |
| Grunheide to Moimenta da Beira | 1,278.93 mi (2,058.24 km) |
| Grunheide to Moita | 1,446.26 mi (2,327.53 km) |
| Grunheide to Moncao | 1,258.92 mi (2,026.03 km) |
| Grunheide to Montalegre | 1,244.73 mi (2,003.21 km) |
