| Gaithersburg to Brandermill (Virginia) | 119.89 mi (192.94 km) |
| Gaithersburg to Brandon (Florida) | 826.92 mi (1,330.79 km) |
| Gaithersburg to Brandon (Mississippi) | 857.90 mi (1,380.66 km) |
| Gaithersburg to Brandon (South Dakota) | 1,047.66 mi (1,686.04 km) |
| Gaithersburg to Branson (Missouri) | 890.58 mi (1,433.25 km) |
| Gaithersburg to Braselton (Georgia) | 504.22 mi (811.47 km) |
| Gaithersburg to Brawley (California) | 2,165.51 mi (3,485.05 km) |
| Gaithersburg to Brea (California) | 2,266.39 mi (3,647.40 km) |
| Gaithersburg to Brecksville (Ohio) | 276.68 mi (445.27 km) |
| Gaithersburg to Bremerton (Washington) | 2,323.45 mi (3,739.24 km) |
| Gaithersburg to Brenham (Texas) | 1,250.64 mi (2,012.71 km) |
| Gaithersburg to Brent (Florida) | 824.99 mi (1,327.69 km) |
| Gaithersburg to Brentwood (California) | 2,382.42 mi (3,834.13 km) |
| Gaithersburg to Brentwood (New York) | 238.69 mi (384.13 km) |
| Gaithersburg to Brentwood (Tennessee) | 566.59 mi (911.84 km) |
