| Ostrow Mazowiecka to Bierun | 220.13 mi (354.26 km) |
| Ostrow Mazowiecka to Bierun Stary | 222.85 mi (358.65 km) |
| Ostrow Mazowiecka to Bilgoraj | 159.50 mi (256.70 km) |
| Ostrow Mazowiecka to Biskupiec | 83.15 mi (133.82 km) |
| Ostrow Mazowiecka to Blachownia | 187.40 mi (301.59 km) |
| Ostrow Mazowiecka to Blonie | 68.06 mi (109.53 km) |
| Ostrow Mazowiecka to Bochnia | 204.62 mi (329.30 km) |
| Ostrow Mazowiecka to Bogatynia | 323.72 mi (520.98 km) |
| Ostrow Mazowiecka to Boguszow-Gorce | 281.12 mi (452.42 km) |
| Ostrow Mazowiecka to Boleslawiec | 289.18 mi (465.39 km) |
| Ostrow Mazowiecka to Braniewo | 138.37 mi (222.69 km) |
| Ostrow Mazowiecka to Brodnica | 108.80 mi (175.09 km) |
| Ostrow Mazowiecka to Brwinow | 67.45 mi (108.54 km) |
| Ostrow Mazowiecka to Brzeg | 231.03 mi (371.80 km) |
| Ostrow Mazowiecka to Brzeg Dolny | 244.10 mi (392.85 km) |
