| Rockville to Beacon (New York) | 237.08 mi (381.54 km) |
| Rockville to Bear (Delaware) | 87.03 mi (140.07 km) |
| Rockville to Beatrice (Nebraska) | 1,042.85 mi (1,678.31 km) |
| Rockville to Beaufort (South Carolina) | 499.34 mi (803.61 km) |
| Rockville to Beaumont (California) | 2,222.58 mi (3,576.90 km) |
| Rockville to Beaumont (Texas) | 1,146.17 mi (1,844.57 km) |
| Rockville to Beaver Dam (Wisconsin) | 676.92 mi (1,089.40 km) |
| Rockville to Beavercreek (Ohio) | 371.35 mi (597.62 km) |
| Rockville to Beaverton (Oregon) | 2,343.10 mi (3,770.86 km) |
| Rockville to Beckley (West Virginia) | 235.68 mi (379.29 km) |
| Rockville to Bedford (Indiana) | 501.42 mi (806.96 km) |
| Rockville to Bedford (Ohio) | 280.70 mi (451.75 km) |
| Rockville to Bedford (Texas) | 1,194.37 mi (1,922.15 km) |
| Rockville to Bedford Heights (Ohio) | 279.84 mi (450.35 km) |
| Rockville to Beech Grove (Indiana) | 478.67 mi (770.35 km) |
