| Grugliasco to Marco de Canavezes | 835.67 mi (1,344.88 km) |
| Grugliasco to Marinha Grande | 916.77 mi (1,475.39 km) |
| Grugliasco to Massama | 967.45 mi (1,556.95 km) |
| Grugliasco to Matosinhos | 861.84 mi (1,387.00 km) |
| Grugliasco to Mealhada | 873.65 mi (1,406.00 km) |
| Grugliasco to Melgaco | 817.20 mi (1,315.15 km) |
| Grugliasco to Melres | 850.84 mi (1,369.29 km) |
| Grugliasco to Mira | 885.39 mi (1,424.90 km) |
| Grugliasco to Miranda do Corvo | 877.27 mi (1,411.84 km) |
| Grugliasco to Mirandela | 781.29 mi (1,257.36 km) |
| Grugliasco to Mogadouro | 763.53 mi (1,228.79 km) |
| Grugliasco to Moimenta da Beira | 816.14 mi (1,313.45 km) |
| Grugliasco to Moita | 958.16 mi (1,542.01 km) |
| Grugliasco to Moncao | 828.50 mi (1,333.34 km) |
| Grugliasco to Montalegre | 801.50 mi (1,289.89 km) |
