| Ostringen to Montemor-o-Novo | 1,110.21 mi (1,786.71 km) |
| Ostringen to Montemor-o-Velho | 1,054.69 mi (1,697.37 km) |
| Ostringen to Montijo | 1,134.11 mi (1,825.17 km) |
| Ostringen to Mortagua | 1,024.75 mi (1,649.17 km) |
| Ostringen to Moura | 1,108.71 mi (1,784.29 km) |
| Ostringen to Murtosa | 1,026.85 mi (1,652.55 km) |
| Ostringen to Nazare | 1,096.17 mi (1,764.12 km) |
| Ostringen to Nelas | 1,005.94 mi (1,618.90 km) |
| Ostringen to Obidos | 1,111.19 mi (1,788.28 km) |
| Ostringen to Odemira | 1,179.87 mi (1,898.82 km) |
| Ostringen to Odivelas | 1,139.45 mi (1,833.77 km) |
| Ostringen to Oeiras | 1,149.90 mi (1,850.58 km) |
| Ostringen to Olhao | 1,180.97 mi (1,900.58 km) |
| Ostringen to Oliveira de Azemeis | 1,015.76 mi (1,634.71 km) |
| Ostringen to Oliveira de Frades | 1,009.79 mi (1,625.10 km) |
