| San Giustino to Marco de Canavezes | 1,048.09 mi (1,686.74 km) |
| San Giustino to Marinha Grande | 1,118.05 mi (1,799.33 km) |
| San Giustino to Massama | 1,160.66 mi (1,867.91 km) |
| San Giustino to Matosinhos | 1,075.62 mi (1,731.04 km) |
| San Giustino to Mealhada | 1,079.37 mi (1,737.07 km) |
| San Giustino to Melgaco | 1,038.25 mi (1,670.90 km) |
| San Giustino to Melres | 1,062.82 mi (1,710.44 km) |
| San Giustino to Mira | 1,092.42 mi (1,758.09 km) |
| San Giustino to Miranda do Corvo | 1,079.91 mi (1,737.95 km) |
| San Giustino to Mirandela | 994.14 mi (1,599.91 km) |
| San Giustino to Mogadouro | 973.59 mi (1,566.85 km) |
| San Giustino to Moimenta da Beira | 1,025.17 mi (1,649.85 km) |
| San Giustino to Moita | 1,149.23 mi (1,849.51 km) |
| San Giustino to Moncao | 1,049.58 mi (1,689.13 km) |
| San Giustino to Montalegre | 1,019.00 mi (1,639.92 km) |
