| Rockville to Beltsville (Maryland) | 12.93 mi (20.80 km) |
| Rockville to Belvedere Park (Georgia) | 539.93 mi (868.94 km) |
| Rockville to Belvidere (Illinois) | 650.93 mi (1,047.57 km) |
| Rockville to Bemidji (Minnesota) | 1,059.89 mi (1,705.73 km) |
| Rockville to Benbrook (Texas) | 1,216.64 mi (1,958.00 km) |
| Rockville to Bend (Oregon) | 2,280.39 mi (3,669.94 km) |
| Rockville to Benicia (California) | 2,406.27 mi (3,872.52 km) |
| Rockville to Bensenville (Illinois) | 599.95 mi (965.52 km) |
| Rockville to Bensville (Maryland) | 33.15 mi (53.35 km) |
| Rockville to Benton (Arkansas) | 906.19 mi (1,458.37 km) |
| Rockville to Bentonville (Arkansas) | 950.57 mi (1,529.79 km) |
| Rockville to Berea (Kentucky) | 400.06 mi (643.83 km) |
| Rockville to Berea (Ohio) | 294.30 mi (473.64 km) |
| Rockville to Berea (South Carolina) | 412.43 mi (663.74 km) |
| Rockville to Bergenfield (New Jersey) | 209.94 mi (337.87 km) |
