| Osterburg to Marco de Canavezes | 1,227.01 mi (1,974.68 km) |
| Osterburg to Marinha Grande | 1,328.48 mi (2,137.98 km) |
| Osterburg to Massama | 1,392.92 mi (2,241.68 km) |
| Osterburg to Matosinhos | 1,246.44 mi (2,005.95 km) |
| Osterburg to Mealhada | 1,278.66 mi (2,057.81 km) |
| Osterburg to Melgaco | 1,184.44 mi (1,906.17 km) |
| Osterburg to Melres | 1,241.74 mi (1,998.39 km) |
| Osterburg to Mira | 1,285.92 mi (2,069.50 km) |
| Osterburg to Miranda do Corvo | 1,289.44 mi (2,075.16 km) |
| Osterburg to Mirandela | 1,177.78 mi (1,895.45 km) |
| Osterburg to Mogadouro | 1,169.62 mi (1,882.32 km) |
| Osterburg to Moimenta da Beira | 1,218.78 mi (1,961.43 km) |
| Osterburg to Moita | 1,388.81 mi (2,235.08 km) |
| Osterburg to Moncao | 1,194.26 mi (1,921.98 km) |
| Osterburg to Montalegre | 1,182.03 mi (1,902.30 km) |
