| Ostrow Mazowiecka to Nymburk | 345.70 mi (556.36 km) |
| Ostrow Mazowiecka to Olomouc | 299.20 mi (481.51 km) |
| Ostrow Mazowiecka to Opava | 262.23 mi (422.01 km) |
| Ostrow Mazowiecka to Orlova | 253.17 mi (407.43 km) |
| Ostrow Mazowiecka to Ostrava | 257.26 mi (414.02 km) |
| Ostrow Mazowiecka to Ostrov | 421.40 mi (678.17 km) |
| Ostrow Mazowiecka to Otrokovice | 312.31 mi (502.62 km) |
| Ostrow Mazowiecka to Pardubice | 325.33 mi (523.57 km) |
| Ostrow Mazowiecka to Pelhrimov | 371.27 mi (597.50 km) |
| Ostrow Mazowiecka to Pisek | 413.82 mi (665.98 km) |
| Ostrow Mazowiecka to Plzen | 424.09 mi (682.51 km) |
| Ostrow Mazowiecka to Podebrady | 344.59 mi (554.56 km) |
| Ostrow Mazowiecka to Policka | 323.56 mi (520.72 km) |
| Ostrow Mazowiecka to Prachatice | 432.04 mi (695.30 km) |
| Ostrow Mazowiecka to Prague | 372.36 mi (599.25 km) |
