| Gaithersburg to Bastogne | 3,937.33 mi (6,336.51 km) |
| Gaithersburg to Beauraing | 3,903.33 mi (6,281.81 km) |
| Gaithersburg to Beernem | 3,810.90 mi (6,133.05 km) |
| Gaithersburg to Beerse | 3,867.84 mi (6,224.69 km) |
| Gaithersburg to Beersel | 3,859.72 mi (6,211.63 km) |
| Gaithersburg to Begijnendijk | 3,872.32 mi (6,231.89 km) |
| Gaithersburg to Beloeil | 3,841.60 mi (6,182.46 km) |
| Gaithersburg to Berchem | 3,853.24 mi (6,201.19 km) |
| Gaithersburg to Beringen | 3,889.29 mi (6,259.20 km) |
| Gaithersburg to Berlaar | 3,864.34 mi (6,219.05 km) |
| Gaithersburg to Berlare | 3,840.60 mi (6,180.86 km) |
| Gaithersburg to Bernissart | 3,840.16 mi (6,180.15 km) |
| Gaithersburg to Bertem | 3,869.93 mi (6,228.05 km) |
| Gaithersburg to Bertrix | 3,922.35 mi (6,312.41 km) |
| Gaithersburg to Beveren | 3,846.11 mi (6,189.71 km) |
