| Orsta to Marco de Canavezes | 1,567.52 mi (2,522.68 km) |
| Orsta to Marinha Grande | 1,674.31 mi (2,694.54 km) |
| Orsta to Massama | 1,745.28 mi (2,808.75 km) |
| Orsta to Matosinhos | 1,576.19 mi (2,536.63 km) |
| Orsta to Mealhada | 1,624.96 mi (2,615.13 km) |
| Orsta to Melgaco | 1,507.94 mi (2,426.80 km) |
| Orsta to Melres | 1,579.11 mi (2,541.33 km) |
| Orsta to Mira | 1,626.09 mi (2,616.94 km) |
| Orsta to Miranda do Corvo | 1,641.89 mi (2,642.37 km) |
| Orsta to Mirandela | 1,532.92 mi (2,467.00 km) |
| Orsta to Mogadouro | 1,536.28 mi (2,472.40 km) |
| Orsta to Moimenta da Beira | 1,572.81 mi (2,531.19 km) |
| Orsta to Moita | 1,747.83 mi (2,812.85 km) |
| Orsta to Moncao | 1,514.22 mi (2,436.90 km) |
| Orsta to Montalegre | 1,519.79 mi (2,445.87 km) |
