| Grudziadz to Marco de Canavezes | 1,505.45 mi (2,422.79 km) |
| Grudziadz to Marinha Grande | 1,604.23 mi (2,581.76 km) |
| Grudziadz to Massama | 1,666.37 mi (2,681.77 km) |
| Grudziadz to Matosinhos | 1,526.26 mi (2,456.27 km) |
| Grudziadz to Mealhada | 1,555.20 mi (2,502.85 km) |
| Grudziadz to Melgaco | 1,466.23 mi (2,359.68 km) |
| Grudziadz to Melres | 1,520.43 mi (2,446.90 km) |
| Grudziadz to Mira | 1,563.39 mi (2,516.03 km) |
| Grudziadz to Miranda do Corvo | 1,564.68 mi (2,518.12 km) |
| Grudziadz to Mirandela | 1,454.66 mi (2,341.05 km) |
| Grudziadz to Mogadouro | 1,444.57 mi (2,324.82 km) |
| Grudziadz to Moimenta da Beira | 1,495.06 mi (2,406.06 km) |
| Grudziadz to Moita | 1,661.05 mi (2,673.20 km) |
| Grudziadz to Moncao | 1,476.40 mi (2,376.03 km) |
| Grudziadz to Montalegre | 1,461.74 mi (2,352.44 km) |
