| Osterburg to Montemor-o-Novo | 1,363.25 mi (2,193.94 km) |
| Osterburg to Montemor-o-Velho | 1,298.03 mi (2,088.97 km) |
| Osterburg to Montijo | 1,384.21 mi (2,227.68 km) |
| Osterburg to Mortagua | 1,268.56 mi (2,041.56 km) |
| Osterburg to Moura | 1,366.88 mi (2,199.78 km) |
| Osterburg to Murtosa | 1,266.98 mi (2,039.01 km) |
| Osterburg to Nazare | 1,340.97 mi (2,158.08 km) |
| Osterburg to Nelas | 1,251.01 mi (2,013.31 km) |
| Osterburg to Obidos | 1,356.88 mi (2,183.68 km) |
| Osterburg to Odemira | 1,435.70 mi (2,310.53 km) |
| Osterburg to Odivelas | 1,387.89 mi (2,233.60 km) |
| Osterburg to Oeiras | 1,398.29 mi (2,250.32 km) |
| Osterburg to Olhao | 1,441.66 mi (2,320.12 km) |
| Osterburg to Oliveira de Azemeis | 1,255.96 mi (2,021.27 km) |
| Osterburg to Oliveira de Frades | 1,252.12 mi (2,015.10 km) |
