| Ostrhauderfehn to Montemor-o-Novo | 1,250.68 mi (2,012.77 km) |
| Ostrhauderfehn to Montemor-o-Velho | 1,176.94 mi (1,894.10 km) |
| Ostrhauderfehn to Montijo | 1,268.43 mi (2,041.35 km) |
| Ostrhauderfehn to Mortagua | 1,148.24 mi (1,847.92 km) |
| Ostrhauderfehn to Moura | 1,260.03 mi (2,027.82 km) |
| Ostrhauderfehn to Murtosa | 1,143.58 mi (1,840.41 km) |
| Ostrhauderfehn to Nazare | 1,220.69 mi (1,964.51 km) |
| Ostrhauderfehn to Nelas | 1,132.02 mi (1,821.81 km) |
| Ostrhauderfehn to Obidos | 1,237.22 mi (1,991.11 km) |
| Ostrhauderfehn to Odemira | 1,325.43 mi (2,133.07 km) |
| Ostrhauderfehn to Odivelas | 1,270.47 mi (2,044.62 km) |
| Ostrhauderfehn to Oeiras | 1,280.70 mi (2,061.09 km) |
| Ostrhauderfehn to Olhao | 1,337.20 mi (2,152.02 km) |
| Ostrhauderfehn to Oliveira de Azemeis | 1,132.74 mi (1,822.97 km) |
| Ostrhauderfehn to Oliveira de Frades | 1,130.73 mi (1,819.74 km) |
