| Southborough to Bierun | 825.96 mi (1,329.25 km) |
| Southborough to Bierun Stary | 826.28 mi (1,329.78 km) |
| Southborough to Bilgoraj | 977.09 mi (1,572.48 km) |
| Southborough to Biskupiec | 886.93 mi (1,427.37 km) |
| Southborough to Blachownia | 811.90 mi (1,306.62 km) |
| Southborough to Blonie | 871.96 mi (1,403.28 km) |
| Southborough to Bochnia | 885.93 mi (1,425.77 km) |
| Southborough to Bogatynia | 637.54 mi (1,026.02 km) |
| Southborough to Boguszow-Gorce | 692.60 mi (1,114.63 km) |
| Southborough to Boleslawiec | 661.12 mi (1,063.96 km) |
| Southborough to Braniewo | 844.66 mi (1,359.35 km) |
| Southborough to Brodnica | 820.26 mi (1,320.08 km) |
| Southborough to Brwinow | 876.43 mi (1,410.48 km) |
| Southborough to Brzeg | 747.02 mi (1,202.22 km) |
| Southborough to Brzeg Dolny | 710.74 mi (1,143.83 km) |
