| Gaithersburg to Brook Park (Ohio) | 289.10 mi (465.25 km) |
| Gaithersburg to Brookfield (Illinois) | 588.48 mi (947.07 km) |
| Gaithersburg to Brookfield (Wisconsin) | 628.93 mi (1,012.16 km) |
| Gaithersburg to Brookhaven (Georgia) | 536.68 mi (863.70 km) |
| Gaithersburg to Brookhaven (Mississippi) | 908.50 mi (1,462.08 km) |
| Gaithersburg to Brookings (South Dakota) | 1,067.56 mi (1,718.07 km) |
| Gaithersburg to Brooklyn (New York) | 202.20 mi (325.41 km) |
| Gaithersburg to Brooklyn (Ohio) | 287.05 mi (461.96 km) |
| Gaithersburg to Brooklyn Center (Minnesota) | 919.47 mi (1,479.74 km) |
| Gaithersburg to Brooklyn Park (Maryland) | 32.41 mi (52.16 km) |
| Gaithersburg to Brooklyn Park (Minnesota) | 922.09 mi (1,483.97 km) |
| Gaithersburg to Brookside (Delaware) | 88.01 mi (141.64 km) |
| Gaithersburg to Broomall (Pennsylvania) | 114.59 mi (184.41 km) |
| Gaithersburg to Broomfield (Colorado) | 1,478.34 mi (2,379.16 km) |
| Gaithersburg to Broussard (Louisiana) | 1,041.01 mi (1,675.35 km) |
