| Gaithersburg to Berkeley (California) | 2,412.79 mi (3,883.01 km) |
| Gaithersburg to Berkley (Colorado) | 1,478.32 mi (2,379.12 km) |
| Gaithersburg to Berkley (Michigan) | 389.13 mi (626.24 km) |
| Gaithersburg to Berthoud (Colorado) | 1,475.11 mi (2,373.96 km) |
| Gaithersburg to Berwick (Pennsylvania) | 142.16 mi (228.79 km) |
| Gaithersburg to Berwyn (Illinois) | 586.03 mi (943.12 km) |
| Gaithersburg to Bessemer (Alabama) | 673.33 mi (1,083.63 km) |
| Gaithersburg to Bethany (Oklahoma) | 1,147.48 mi (1,846.69 km) |
| Gaithersburg to Bethany (Oregon) | 2,339.17 mi (3,764.53 km) |
| Gaithersburg to Bethel Park (Pennsylvania) | 171.04 mi (275.26 km) |
| Gaithersburg to Bethesda (Maryland) | 11.41 mi (18.36 km) |
| Gaithersburg to Bethlehem (Pennsylvania) | 142.11 mi (228.71 km) |
| Gaithersburg to Bethpage (New York) | 226.77 mi (364.96 km) |
| Gaithersburg to Bettendorf (Iowa) | 717.52 mi (1,154.73 km) |
| Gaithersburg to Beverly (Massachusetts) | 407.77 mi (656.24 km) |
