| Boulder to Boppard | 4,994.93 mi (8,038.56 km) |
| Boulder to Borgentreich | 4,985.76 mi (8,023.81 km) |
| Boulder to Borgholzhausen | 4,930.96 mi (7,935.62 km) |
| Boulder to Borken | 4,897.73 mi (7,882.14 km) |
| Boulder to Borna | 5,108.19 mi (8,220.83 km) |
| Boulder to Bornheim | 4,951.40 mi (7,968.51 km) |
| Boulder to Bosel | 4,878.31 mi (7,850.88 km) |
| Boulder to Bottrop | 4,913.63 mi (7,907.73 km) |
| Boulder to Bovenden | 5,005.73 mi (8,055.94 km) |
| Boulder to Brackenheim | 5,097.26 mi (8,203.24 km) |
| Boulder to Brake | 4,879.52 mi (7,852.83 km) |
| Boulder to Brakel | 4,976.61 mi (8,009.08 km) |
| Boulder to Bramsche | 4,907.13 mi (7,897.27 km) |
| Boulder to Brand | 4,924.34 mi (7,924.97 km) |
| Boulder to Brand-Erbisdorf | 5,145.47 mi (8,280.83 km) |
