| Boulder to Bispham | 4,486.02 mi (7,219.56 km) |
| Boulder to Blackburn | 4,508.90 mi (7,256.37 km) |
| Boulder to Blackpool | 4,487.18 mi (7,221.42 km) |
| Boulder to Blairgowrie | 4,371.36 mi (7,035.02 km) |
| Boulder to Blandford Forum | 4,635.33 mi (7,459.84 km) |
| Boulder to Blaydon | 4,486.36 mi (7,220.10 km) |
| Boulder to Bletchley | 4,638.74 mi (7,465.34 km) |
| Boulder to Bloxwich | 4,570.09 mi (7,354.86 km) |
| Boulder to Blunsdon Saint Andrew | 4,617.91 mi (7,431.81 km) |
| Boulder to Blyth | 4,486.61 mi (7,220.49 km) |
| Boulder to Bo'ness | 4,384.36 mi (7,055.94 km) |
| Boulder to Bodmin | 4,559.50 mi (7,337.81 km) |
| Boulder to Bognor Regis | 4,690.65 mi (7,548.87 km) |
| Boulder to Bolsover | 4,569.63 mi (7,354.12 km) |
| Boulder to Bolton | 4,517.37 mi (7,270.01 km) |
