| Grabels to Marco de Canavezes | 632.35 mi (1,017.66 km) |
| Grabels to Marinha Grande | 709.09 mi (1,141.17 km) |
| Grabels to Massama | 757.97 mi (1,219.83 km) |
| Grabels to Matosinhos | 659.33 mi (1,061.09 km) |
| Grabels to Mealhada | 667.37 mi (1,074.03 km) |
| Grabels to Melgaco | 619.52 mi (997.01 km) |
| Grabels to Melres | 647.32 mi (1,041.76 km) |
| Grabels to Mira | 679.67 mi (1,093.82 km) |
| Grabels to Miranda do Corvo | 669.92 mi (1,078.14 km) |
| Grabels to Mirandela | 578.05 mi (930.28 km) |
| Grabels to Mogadouro | 558.80 mi (899.30 km) |
| Grabels to Moimenta da Beira | 611.09 mi (983.45 km) |
| Grabels to Moita | 748.32 mi (1,204.31 km) |
| Grabels to Moncao | 630.85 mi (1,015.26 km) |
| Grabels to Montalegre | 601.17 mi (967.49 km) |
