| Ostrow Mazowiecka to Blace | 657.64 mi (1,058.38 km) |
| Ostrow Mazowiecka to Bogatic | 561.23 mi (903.22 km) |
| Ostrow Mazowiecka to Bojnik | 676.19 mi (1,088.21 km) |
| Ostrow Mazowiecka to Boljevac | 620.14 mi (998.02 km) |
| Ostrow Mazowiecka to Bor | 599.09 mi (964.14 km) |
| Ostrow Mazowiecka to Borca | 551.83 mi (888.09 km) |
| Ostrow Mazowiecka to Bosilegrad | 712.12 mi (1,146.05 km) |
| Ostrow Mazowiecka to Brus | 651.82 mi (1,049.01 km) |
| Ostrow Mazowiecka to Bujanovac | 713.99 mi (1,149.05 km) |
| Ostrow Mazowiecka to Cacak | 619.59 mi (997.13 km) |
| Ostrow Mazowiecka to Cajetina | 633.22 mi (1,019.08 km) |
| Ostrow Mazowiecka to Cicevac | 627.93 mi (1,010.56 km) |
| Ostrow Mazowiecka to Coka | 480.89 mi (773.92 km) |
| Ostrow Mazowiecka to Crna Trava | 690.48 mi (1,111.22 km) |
| Ostrow Mazowiecka to Crvenka | 505.54 mi (813.59 km) |
