| Gaithersburg to Bathgate | 3,439.94 mi (5,536.05 km) |
| Gaithersburg to Batley | 3,555.37 mi (5,721.82 km) |
| Gaithersburg to Beaconsfield | 3,638.86 mi (5,856.19 km) |
| Gaithersburg to Bearsden | 3,413.62 mi (5,493.69 km) |
| Gaithersburg to Bebington | 3,508.27 mi (5,646.01 km) |
| Gaithersburg to Beccles | 3,708.23 mi (5,967.82 km) |
| Gaithersburg to Beckenham | 3,668.09 mi (5,903.23 km) |
| Gaithersburg to Bedford | 3,633.98 mi (5,848.32 km) |
| Gaithersburg to Bedlington | 3,531.03 mi (5,682.64 km) |
| Gaithersburg to Bedwas | 3,533.83 mi (5,687.15 km) |
| Gaithersburg to Bedworth | 3,586.31 mi (5,771.61 km) |
| Gaithersburg to Beeston | 3,587.60 mi (5,773.68 km) |
| Gaithersburg to Belfast | 3,372.02 mi (5,426.74 km) |
| Gaithersburg to Belgrave | 3,596.66 mi (5,788.26 km) |
| Gaithersburg to Bellshill | 3,426.80 mi (5,514.91 km) |
