| Boulder to Bathgate | 4,387.56 mi (7,061.10 km) |
| Boulder to Batley | 4,538.49 mi (7,303.99 km) |
| Boulder to Beaconsfield | 4,658.25 mi (7,496.74 km) |
| Boulder to Bearsden | 4,364.47 mi (7,023.94 km) |
| Boulder to Bebington | 4,506.90 mi (7,253.15 km) |
| Boulder to Beccles | 4,696.89 mi (7,558.91 km) |
| Boulder to Beckenham | 4,687.33 mi (7,543.53 km) |
| Boulder to Bedford | 4,641.90 mi (7,470.41 km) |
| Boulder to Bedlington | 4,484.09 mi (7,216.45 km) |
| Boulder to Bedwas | 4,569.11 mi (7,353.27 km) |
| Boulder to Bedworth | 4,593.69 mi (7,392.83 km) |
| Boulder to Beeston | 4,584.32 mi (7,377.75 km) |
| Boulder to Belfast | 4,360.22 mi (7,017.10 km) |
| Boulder to Belgrave | 4,598.27 mi (7,400.21 km) |
| Boulder to Bellshill | 4,378.35 mi (7,046.27 km) |
