| South Portland to Bierun | 3,985.74 mi (6,414.43 km) |
| South Portland to Bierun Stary | 3,987.03 mi (6,416.50 km) |
| South Portland to Bilgoraj | 4,106.36 mi (6,608.54 km) |
| South Portland to Biskupiec | 3,922.77 mi (6,313.09 km) |
| South Portland to Blachownia | 3,957.66 mi (6,369.25 km) |
| South Portland to Blonie | 3,968.64 mi (6,386.91 km) |
| South Portland to Bochnia | 4,041.59 mi (6,504.30 km) |
| South Portland to Bogatynia | 3,801.19 mi (6,117.43 km) |
| South Portland to Boguszow-Gorce | 3,853.42 mi (6,201.48 km) |
| South Portland to Boleslawiec | 3,812.67 mi (6,135.89 km) |
| South Portland to Braniewo | 3,865.24 mi (6,220.49 km) |
| South Portland to Brodnica | 3,887.67 mi (6,256.60 km) |
| South Portland to Brwinow | 3,974.34 mi (6,396.09 km) |
| South Portland to Brzeg | 3,898.82 mi (6,274.54 km) |
| South Portland to Brzeg Dolny | 3,856.26 mi (6,206.06 km) |
