| Rockville to Berkeley (California) | 2,416.59 mi (3,889.12 km) |
| Rockville to Berkley (Colorado) | 1,482.02 mi (2,385.08 km) |
| Rockville to Berkley (Michigan) | 393.76 mi (633.69 km) |
| Rockville to Berthoud (Colorado) | 1,478.89 mi (2,380.04 km) |
| Rockville to Berwick (Pennsylvania) | 144.43 mi (232.44 km) |
| Rockville to Berwyn (Illinois) | 590.23 mi (949.88 km) |
| Rockville to Bessemer (Alabama) | 674.00 mi (1,084.70 km) |
| Rockville to Bethany (Oklahoma) | 1,150.18 mi (1,851.04 km) |
| Rockville to Bethany (Oregon) | 2,343.51 mi (3,771.52 km) |
| Rockville to Bethel Park (Pennsylvania) | 175.49 mi (282.42 km) |
| Rockville to Bethesda (Maryland) | 6.97 mi (11.22 km) |
| Rockville to Bethlehem (Pennsylvania) | 142.67 mi (229.61 km) |
| Rockville to Bethpage (New York) | 225.96 mi (363.64 km) |
| Rockville to Bettendorf (Iowa) | 721.55 mi (1,161.23 km) |
| Rockville to Beverly (Massachusetts) | 407.50 mi (655.80 km) |
