| Boulder to Brownhills | 4,571.20 mi (7,356.63 km) |
| Boulder to Broxbourne | 4,673.14 mi (7,520.69 km) |
| Boulder to Broxburn | 4,391.95 mi (7,068.16 km) |
| Boulder to Bryn | 4,512.79 mi (7,262.63 km) |
| Boulder to Buckhurst Hill | 4,679.99 mi (7,531.72 km) |
| Boulder to Buckie | 4,342.52 mi (6,988.61 km) |
| Boulder to Buckingham | 4,630.00 mi (7,451.27 km) |
| Boulder to Buckley | 4,511.04 mi (7,259.82 km) |
| Boulder to Bucksburn | 4,385.97 mi (7,058.54 km) |
| Boulder to Bude | 4,551.86 mi (7,325.50 km) |
| Boulder to Bulwell | 4,581.93 mi (7,373.91 km) |
| Boulder to Burbage | 4,595.95 mi (7,396.46 km) |
| Boulder to Burgess Hill | 4,702.69 mi (7,568.24 km) |
| Boulder to Burnham | 4,659.89 mi (7,499.37 km) |
| Boulder to Burnham-on-Sea | 4,590.72 mi (7,388.05 km) |
