| Orsta to Montemor-o-Novo | 1,736.31 mi (2,794.32 km) |
| Orsta to Montemor-o-Velho | 1,642.89 mi (2,643.98 km) |
| Orsta to Montijo | 1,744.34 mi (2,807.25 km) |
| Orsta to Mortagua | 1,618.32 mi (2,604.44 km) |
| Orsta to Moura | 1,759.81 mi (2,832.14 km) |
| Orsta to Murtosa | 1,604.75 mi (2,582.59 km) |
| Orsta to Nazare | 1,686.31 mi (2,713.85 km) |
| Orsta to Nelas | 1,607.00 mi (2,586.22 km) |
| Orsta to Obidos | 1,703.71 mi (2,741.86 km) |
| Orsta to Odemira | 1,813.39 mi (2,918.37 km) |
| Orsta to Odivelas | 1,741.58 mi (2,802.80 km) |
| Orsta to Oeiras | 1,750.79 mi (2,817.63 km) |
| Orsta to Olhao | 1,839.25 mi (2,959.98 km) |
| Orsta to Oliveira de Azemeis | 1,595.22 mi (2,567.26 km) |
| Orsta to Oliveira de Frades | 1,598.83 mi (2,573.07 km) |
