| Ploiesti to Oberkirch | 882.63 mi (1,420.45 km) |
| Ploiesti to Obernburg am Main | 856.69 mi (1,378.70 km) |
| Ploiesti to Obernkirchen | 919.95 mi (1,480.52 km) |
| Ploiesti to Oberschleissheim | 722.09 mi (1,162.09 km) |
| Ploiesti to Oberstdorf | 770.84 mi (1,240.55 km) |
| Ploiesti to Obertraubling | 708.84 mi (1,140.77 km) |
| Ploiesti to Obertshausen | 874.37 mi (1,407.17 km) |
| Ploiesti to Oberursel | 888.03 mi (1,429.14 km) |
| Ploiesti to Ochsenfurt | 813.34 mi (1,308.94 km) |
| Ploiesti to Ochsenhausen | 792.77 mi (1,275.84 km) |
| Ploiesti to Ochtrup | 992.26 mi (1,596.88 km) |
| Ploiesti to Odenthal | 966.61 mi (1,555.60 km) |
| Ploiesti to Oelde | 944.64 mi (1,520.24 km) |
| Ploiesti to Oelsnitz | 745.67 mi (1,200.04 km) |
| Ploiesti to Oer-Erkenschwick | 975.33 mi (1,569.64 km) |
