| Portalegre to Oschatz | 1,288.42 mi (2,073.51 km) |
| Portalegre to Oschersleben | 1,250.94 mi (2,013.19 km) |
| Portalegre to Osnabruck | 1,160.20 mi (1,867.16 km) |
| Portalegre to Ostbevern | 1,142.20 mi (1,838.20 km) |
| Portalegre to Osterburg | 1,300.51 mi (2,092.97 km) |
| Portalegre to Ostercappeln | 1,168.96 mi (1,881.25 km) |
| Portalegre to Osterhofen | 1,199.09 mi (1,929.75 km) |
| Portalegre to Osterholz-Scharmbeck | 1,227.85 mi (1,976.03 km) |
| Portalegre to Osternienburg | 1,268.48 mi (2,041.42 km) |
| Portalegre to Osterode | 1,205.10 mi (1,939.43 km) |
| Portalegre to Osterwieck | 1,230.86 mi (1,980.88 km) |
| Portalegre to Ostfildern | 1,049.14 mi (1,688.43 km) |
| Portalegre to Osthofen | 1,053.09 mi (1,694.79 km) |
| Portalegre to Ostrhauderfehn | 1,188.89 mi (1,913.33 km) |
| Portalegre to Ostringen | 1,047.22 mi (1,685.34 km) |
