| Gaithersburg to Bernburg | 4,123.58 mi (6,636.26 km) |
| Gaithersburg to Bersenbruck | 3,955.46 mi (6,365.70 km) |
| Gaithersburg to Besigheim | 4,105.84 mi (6,607.70 km) |
| Gaithersburg to Bestwig | 4,006.73 mi (6,448.20 km) |
| Gaithersburg to Betzdorf | 4,002.32 mi (6,441.11 km) |
| Gaithersburg to Beverstedt | 3,965.35 mi (6,381.62 km) |
| Gaithersburg to Beverungen | 4,036.34 mi (6,495.86 km) |
| Gaithersburg to Bexbach | 4,018.60 mi (6,467.32 km) |
| Gaithersburg to Biberach | 4,159.70 mi (6,694.39 km) |
| Gaithersburg to Biblis | 4,057.33 mi (6,529.64 km) |
| Gaithersburg to Bieber | 4,035.93 mi (6,495.21 km) |
| Gaithersburg to Biedenkopf | 4,024.89 mi (6,477.44 km) |
| Gaithersburg to Bielefeld | 3,993.56 mi (6,427.01 km) |
| Gaithersburg to Bietigheim-Bissingen | 4,106.45 mi (6,608.69 km) |
| Gaithersburg to Billerbeck | 3,946.37 mi (6,351.07 km) |
