| Round Rock to Bridgeport (Connecticut) | 1,548.07 mi (2,491.38 km) |
| Round Rock to Bridgeton (Missouri) | 701.84 mi (1,129.50 km) |
| Round Rock to Bridgetown (Ohio) | 947.59 mi (1,524.99 km) |
| Round Rock to Bridgeview (Illinois) | 948.72 mi (1,526.81 km) |
| Round Rock to Brigham City (Utah) | 1,102.19 mi (1,773.81 km) |
| Round Rock to Brighton (Colorado) | 766.02 mi (1,232.80 km) |
| Round Rock to Bristol (Connecticut) | 1,572.50 mi (2,530.69 km) |
| Round Rock to Bristol (Tennessee) | 980.78 mi (1,578.41 km) |
| Round Rock to Bristol (Virginia) | 985.12 mi (1,585.40 km) |
| Round Rock to Broadlands (Virginia) | 1,281.15 mi (2,061.81 km) |
| Round Rock to Broadview Heights (Ohio) | 1,161.13 mi (1,868.66 km) |
| Round Rock to Brock Hall (Maryland) | 1,316.24 mi (2,118.28 km) |
| Round Rock to Brockton (Massachusetts) | 1,674.53 mi (2,694.89 km) |
| Round Rock to Broken Arrow (Oklahoma) | 395.98 mi (637.28 km) |
| Round Rock to Bronx (New York) | 1,507.02 mi (2,425.32 km) |
