| Targu Ocna to Opole | 499.65 mi (804.11 km) |
| Targu Ocna to Orzesze | 449.92 mi (724.08 km) |
| Targu Ocna to Osowa | 666.82 mi (1,073.14 km) |
| Targu Ocna to Ostroda | 591.17 mi (951.40 km) |
| Targu Ocna to Ostroleka | 520.20 mi (837.18 km) |
| Targu Ocna to Ostrow Mazowiecka | 497.46 mi (800.58 km) |
| Targu Ocna to Ostrow Wielkopolski | 544.38 mi (876.10 km) |
| Targu Ocna to Ostrowiec Swietokrzyski | 400.09 mi (643.88 km) |
| Targu Ocna to Ostrzeszow | 530.35 mi (853.52 km) |
| Targu Ocna to Oswiecim | 428.27 mi (689.24 km) |
| Targu Ocna to Otwock | 469.86 mi (756.17 km) |
| Targu Ocna to Ozarow Mazowiecki | 486.63 mi (783.16 km) |
| Targu Ocna to Ozimek | 489.81 mi (788.27 km) |
| Targu Ocna to Ozorkow | 513.71 mi (826.73 km) |
| Targu Ocna to Pabianice | 494.92 mi (796.50 km) |
