| Ostrov to Montemor-o-Novo | 1,309.83 mi (2,107.97 km) |
| Ostrov to Montemor-o-Velho | 1,256.66 mi (2,022.40 km) |
| Ostrov to Montijo | 1,334.54 mi (2,147.74 km) |
| Ostrov to Mortagua | 1,226.68 mi (1,974.14 km) |
| Ostrov to Moura | 1,306.40 mi (2,102.45 km) |
| Ostrov to Murtosa | 1,229.27 mi (1,978.32 km) |
| Ostrov to Nazare | 1,297.84 mi (2,088.66 km) |
| Ostrov to Nelas | 1,207.68 mi (1,943.57 km) |
| Ostrov to Obidos | 1,312.66 mi (2,112.53 km) |
| Ostrov to Odemira | 1,378.37 mi (2,218.28 km) |
| Ostrov to Odivelas | 1,340.29 mi (2,156.99 km) |
| Ostrov to Oeiras | 1,350.74 mi (2,173.80 km) |
| Ostrov to Olhao | 1,377.27 mi (2,216.50 km) |
| Ostrov to Oliveira de Azemeis | 1,218.19 mi (1,960.49 km) |
| Ostrov to Oliveira de Frades | 1,211.96 mi (1,950.46 km) |
