| Gaithersburg to Brandenburg | 4,135.28 mi (6,655.09 km) |
| Gaithersburg to Brandis | 4,171.57 mi (6,713.49 km) |
| Gaithersburg to Braunfels | 4,030.37 mi (6,486.25 km) |
| Gaithersburg to Braunsbedra | 4,145.79 mi (6,672.00 km) |
| Gaithersburg to Braunschweig | 4,063.02 mi (6,538.79 km) |
| Gaithersburg to Breckerfeld | 3,972.70 mi (6,393.44 km) |
| Gaithersburg to Breisach am Rhein | 4,070.58 mi (6,550.97 km) |
| Gaithersburg to Bremen | 3,974.27 mi (6,395.97 km) |
| Gaithersburg to Bremerhaven | 3,953.32 mi (6,362.25 km) |
| Gaithersburg to Bremervorde | 3,975.90 mi (6,398.59 km) |
| Gaithersburg to Bretten | 4,086.92 mi (6,577.26 km) |
| Gaithersburg to Bretzfeld | 4,112.09 mi (6,617.77 km) |
| Gaithersburg to Brieselang | 4,147.77 mi (6,675.18 km) |
| Gaithersburg to Brilon | 4,012.50 mi (6,457.50 km) |
| Gaithersburg to Bruchhausen-Vilsen | 3,988.82 mi (6,419.38 km) |
