| Ploiesti to Oerlinghausen | 928.24 mi (1,493.86 km) |
| Ploiesti to Oestrich-Winkel | 908.53 mi (1,462.13 km) |
| Ploiesti to Offenburg | 888.66 mi (1,430.15 km) |
| Ploiesti to Oftersheim | 872.14 mi (1,403.57 km) |
| Ploiesti to Ohrdruf | 814.65 mi (1,311.06 km) |
| Ploiesti to Ohringen | 829.25 mi (1,334.55 km) |
| Ploiesti to Olbernhau | 707.93 mi (1,139.30 km) |
| Ploiesti to Olching | 732.55 mi (1,178.93 km) |
| Ploiesti to Oldenburg | 981.44 mi (1,579.48 km) |
| Ploiesti to Oldenburg in Holstein | 933.03 mi (1,501.57 km) |
| Ploiesti to Olfen | 971.90 mi (1,564.12 km) |
| Ploiesti to Olpe | 936.78 mi (1,507.61 km) |
| Ploiesti to Olsberg | 918.60 mi (1,478.35 km) |
| Ploiesti to Oranienburg | 791.20 mi (1,273.32 km) |
| Ploiesti to Ortenberg | 871.24 mi (1,402.13 km) |
