| Kastamonu to Bierun | 928.01 mi (1,493.49 km) |
| Kastamonu to Bierun Stary | 926.54 mi (1,491.13 km) |
| Kastamonu to Bilgoraj | 824.66 mi (1,327.16 km) |
| Kastamonu to Biskupiec | 1,045.62 mi (1,682.77 km) |
| Kastamonu to Blachownia | 959.15 mi (1,543.61 km) |
| Kastamonu to Blonie | 969.98 mi (1,561.03 km) |
| Kastamonu to Bochnia | 874.26 mi (1,406.98 km) |
| Kastamonu to Bogatynia | 1,110.66 mi (1,787.43 km) |
| Kastamonu to Boguszow-Gorce | 1,058.84 mi (1,704.04 km) |
| Kastamonu to Boleslawiec | 1,100.26 mi (1,770.71 km) |
| Kastamonu to Braniewo | 1,102.54 mi (1,774.36 km) |
| Kastamonu to Brodnica | 1,057.92 mi (1,702.56 km) |
| Kastamonu to Brwinow | 964.13 mi (1,551.62 km) |
| Kastamonu to Brzeg | 1,015.26 mi (1,633.91 km) |
| Kastamonu to Brzeg Dolny | 1,058.30 mi (1,703.17 km) |
