| Round Rock to Burley (Idaho) | 1,216.87 mi (1,958.37 km) |
| Round Rock to Burlingame (California) | 1,490.49 mi (2,398.71 km) |
| Round Rock to Burlington (Iowa) | 798.93 mi (1,285.75 km) |
| Round Rock to Burlington (Kentucky) | 938.56 mi (1,510.47 km) |
| Round Rock to Burlington (North Carolina) | 1,116.37 mi (1,796.63 km) |
| Round Rock to Burlington (Vermont) | 1,639.79 mi (2,638.99 km) |
| Round Rock to Burlington (Wisconsin) | 986.37 mi (1,587.40 km) |
| Round Rock to Burnsville (Minnesota) | 1,012.15 mi (1,628.90 km) |
| Round Rock to Burr Ridge (Illinois) | 945.55 mi (1,521.71 km) |
| Round Rock to Burton (Michigan) | 1,157.34 mi (1,862.56 km) |
| Round Rock to Burtonsville (Maryland) | 1,312.74 mi (2,112.65 km) |
| Round Rock to Butler (Pennsylvania) | 1,222.42 mi (1,967.30 km) |
| Round Rock to Butte (Montana) | 1,333.45 mi (2,145.98 km) |
| Round Rock to Byram (Mississippi) | 450.10 mi (724.36 km) |
| Round Rock to Cabot (Arkansas) | 449.07 mi (722.70 km) |
