| Rockville to Badger (Alaska) | 3,246.15 mi (5,224.17 km) |
| Rockville to Bailey's Crossroads (Virginia) | 16.34 mi (26.30 km) |
| Rockville to Bainbridge (Georgia) | 703.39 mi (1,132.00 km) |
| Rockville to Bainbridge Island (Washington) | 2,319.75 mi (3,733.28 km) |
| Rockville to Baker (Louisiana) | 985.76 mi (1,586.43 km) |
| Rockville to Bakersfield (California) | 2,298.34 mi (3,698.82 km) |
| Rockville to Balch Springs (Texas) | 1,171.51 mi (1,885.36 km) |
| Rockville to Baldwin (New York) | 217.07 mi (349.34 km) |
| Rockville to Baldwin (Pennsylvania) | 173.81 mi (279.71 km) |
| Rockville to Baldwin Park (California) | 2,271.54 mi (3,655.69 km) |
| Rockville to Ballenger Creek (Maryland) | 24.97 mi (40.19 km) |
| Rockville to Ballwin (Missouri) | 721.00 mi (1,160.34 km) |
| Rockville to Baltimore (Maryland) | 32.77 mi (52.73 km) |
| Rockville to Bangor (Maine) | 584.65 mi (940.90 km) |
| Rockville to Banning (California) | 2,217.49 mi (3,568.70 km) |
