| Ploiesti to Opole | 544.75 mi (876.69 km) |
| Ploiesti to Orzesze | 494.09 mi (795.16 km) |
| Ploiesti to Osowa | 736.28 mi (1,184.92 km) |
| Ploiesti to Ostroda | 663.22 mi (1,067.34 km) |
| Ploiesti to Ostroleka | 596.35 mi (959.73 km) |
| Ploiesti to Ostrow Mazowiecka | 574.17 mi (924.03 km) |
| Ploiesti to Ostrow Wielkopolski | 596.83 mi (960.51 km) |
| Ploiesti to Ostrowiec Swietokrzyski | 465.82 mi (749.66 km) |
| Ploiesti to Ostrzeszow | 581.59 mi (935.98 km) |
| Ploiesti to Oswiecim | 473.79 mi (762.50 km) |
| Ploiesti to Otwock | 541.15 mi (870.89 km) |
| Ploiesti to Ozarow Mazowiecki | 556.15 mi (895.03 km) |
| Ploiesti to Ozimek | 536.25 mi (863.00 km) |
| Ploiesti to Ozorkow | 574.77 mi (925.01 km) |
| Ploiesti to Pabianice | 554.47 mi (892.34 km) |
