| Bacau to Opole | 497.37 mi (800.44 km) |
| Bacau to Orzesze | 448.23 mi (721.36 km) |
| Bacau to Osowa | 655.86 mi (1,055.51 km) |
| Bacau to Ostroda | 579.47 mi (932.56 km) |
| Bacau to Ostroleka | 507.14 mi (816.17 km) |
| Bacau to Ostrow Mazowiecka | 484.25 mi (779.33 km) |
| Bacau to Ostrow Wielkopolski | 539.57 mi (868.36 km) |
| Bacau to Ostrowiec Swietokrzyski | 391.53 mi (630.11 km) |
| Bacau to Ostrzeszow | 525.99 mi (846.50 km) |
| Bacau to Oswiecim | 426.31 mi (686.09 km) |
| Bacau to Otwock | 458.86 mi (738.47 km) |
| Bacau to Ozarow Mazowiecki | 476.23 mi (766.41 km) |
| Bacau to Ozimek | 487.17 mi (784.02 km) |
| Bacau to Ozorkow | 506.18 mi (814.62 km) |
| Bacau to Pabianice | 488.00 mi (785.36 km) |
