| Osterwieck to Montemor-o-Novo | 1,293.67 mi (2,081.96 km) |
| Osterwieck to Montemor-o-Velho | 1,229.78 mi (1,979.14 km) |
| Osterwieck to Montijo | 1,315.05 mi (2,116.37 km) |
| Osterwieck to Mortagua | 1,200.22 mi (1,931.57 km) |
| Osterwieck to Moura | 1,296.63 mi (2,086.73 km) |
| Osterwieck to Murtosa | 1,199.19 mi (1,929.91 km) |
| Osterwieck to Nazare | 1,272.55 mi (2,047.97 km) |
| Osterwieck to Nelas | 1,182.47 mi (1,903.00 km) |
| Osterwieck to Obidos | 1,288.33 mi (2,073.37 km) |
| Osterwieck to Odemira | 1,365.78 mi (2,198.01 km) |
| Osterwieck to Odivelas | 1,318.97 mi (2,122.68 km) |
| Osterwieck to Oeiras | 1,329.38 mi (2,139.43 km) |
| Osterwieck to Olhao | 1,371.13 mi (2,206.62 km) |
| Osterwieck to Oliveira de Azemeis | 1,188.14 mi (1,912.13 km) |
| Osterwieck to Oliveira de Frades | 1,183.98 mi (1,905.44 km) |
