| South Portland to Boppard | 3,532.63 mi (5,685.22 km) |
| South Portland to Borgentreich | 3,559.93 mi (5,729.15 km) |
| South Portland to Borgholzhausen | 3,507.85 mi (5,645.33 km) |
| South Portland to Borken | 3,459.13 mi (5,566.93 km) |
| South Portland to Borna | 3,699.80 mi (5,954.25 km) |
| South Portland to Bornheim | 3,494.17 mi (5,623.32 km) |
| South Portland to Bosel | 3,469.82 mi (5,584.14 km) |
| South Portland to Bottrop | 3,469.72 mi (5,583.98 km) |
| South Portland to Bovenden | 3,585.46 mi (5,770.25 km) |
| South Portland to Brackenheim | 3,626.33 mi (5,836.01 km) |
| South Portland to Brake | 3,481.26 mi (5,602.54 km) |
| South Portland to Brakel | 3,553.02 mi (5,718.04 km) |
| South Portland to Bramsche | 3,487.31 mi (5,612.28 km) |
| South Portland to Brand | 3,460.83 mi (5,569.67 km) |
| South Portland to Brand-Erbisdorf | 3,739.42 mi (6,018.01 km) |
