| Portlethen to Oberkirch | 725.83 mi (1,168.10 km) |
| Portlethen to Obernburg am Main | 679.50 mi (1,093.56 km) |
| Portlethen to Obernkirchen | 557.25 mi (896.80 km) |
| Portlethen to Oberschleissheim | 833.77 mi (1,341.82 km) |
| Portlethen to Oberstdorf | 846.05 mi (1,361.59 km) |
| Portlethen to Obertraubling | 813.13 mi (1,308.60 km) |
| Portlethen to Obertshausen | 658.72 mi (1,060.10 km) |
| Portlethen to Oberursel | 644.26 mi (1,036.83 km) |
| Portlethen to Ochsenfurt | 715.75 mi (1,151.88 km) |
| Portlethen to Ochsenhausen | 799.50 mi (1,286.66 km) |
| Portlethen to Ochtrup | 500.69 mi (805.79 km) |
| Portlethen to Odenthal | 559.54 mi (900.49 km) |
| Portlethen to Oelde | 547.64 mi (881.35 km) |
| Portlethen to Oelsnitz | 740.57 mi (1,191.83 km) |
| Portlethen to Oer-Erkenschwick | 530.97 mi (854.52 km) |
