| Rockville to Baraboo (Wisconsin) | 719.21 mi (1,157.46 km) |
| Rockville to Barberton (Ohio) | 270.26 mi (434.95 km) |
| Rockville to Bardstown (Kentucky) | 457.36 mi (736.05 km) |
| Rockville to Barrington (Illinois) | 612.73 mi (986.10 km) |
| Rockville to Barstow (California) | 2,203.41 mi (3,546.04 km) |
| Rockville to Bartlesville (Oklahoma) | 1,035.15 mi (1,665.91 km) |
| Rockville to Bartlett (Illinois) | 613.37 mi (987.13 km) |
| Rockville to Bartlett (Tennessee) | 745.54 mi (1,199.83 km) |
| Rockville to Bartow (Florida) | 818.67 mi (1,317.53 km) |
| Rockville to Batavia (Illinois) | 616.18 mi (991.65 km) |
| Rockville to Batavia (New York) | 275.74 mi (443.76 km) |
| Rockville to Batesville (Arkansas) | 825.15 mi (1,327.96 km) |
| Rockville to Baton Rouge (Louisiana) | 990.88 mi (1,594.67 km) |
| Rockville to Battle Creek (Michigan) | 477.50 mi (768.46 km) |
| Rockville to Battle Ground (Washington) | 2,327.92 mi (3,746.42 km) |
