| Round Rock to Beltsville (Maryland) | 1,311.61 mi (2,110.83 km) |
| Round Rock to Belvedere Park (Georgia) | 814.51 mi (1,310.83 km) |
| Round Rock to Belvidere (Illinois) | 945.36 mi (1,521.41 km) |
| Round Rock to Bemidji (Minnesota) | 1,180.83 mi (1,900.36 km) |
| Round Rock to Benbrook (Texas) | 149.14 mi (240.02 km) |
| Round Rock to Bend (Oregon) | 1,591.43 mi (2,561.16 km) |
| Round Rock to Benicia (California) | 1,486.33 mi (2,392.01 km) |
| Round Rock to Bensenville (Illinois) | 956.23 mi (1,538.90 km) |
| Round Rock to Bensville (Maryland) | 1,297.36 mi (2,087.89 km) |
| Round Rock to Benton (Arkansas) | 407.68 mi (656.10 km) |
| Round Rock to Bentonville (Arkansas) | 448.60 mi (721.95 km) |
| Round Rock to Berea (Kentucky) | 906.46 mi (1,458.81 km) |
| Round Rock to Berea (Ohio) | 1,155.22 mi (1,859.15 km) |
| Round Rock to Berea (South Carolina) | 932.30 mi (1,500.40 km) |
| Round Rock to Bergenfield (New Jersey) | 1,502.39 mi (2,417.86 km) |
