| Round Rock to Beyne-Heusay | 5,149.53 mi (8,287.37 km) |
| Round Rock to Bierbeek | 5,108.51 mi (8,221.35 km) |
| Round Rock to Bilzen | 5,135.95 mi (8,265.51 km) |
| Round Rock to Binche | 5,099.85 mi (8,207.42 km) |
| Round Rock to Bissegem | 5,049.53 mi (8,126.44 km) |
| Round Rock to Blankenberge | 5,030.14 mi (8,095.23 km) |
| Round Rock to Blegny | 5,151.00 mi (8,289.73 km) |
| Round Rock to Bocholt | 5,127.96 mi (8,252.66 km) |
| Round Rock to Boechout | 5,087.17 mi (8,187.01 km) |
| Round Rock to Bonheiden | 5,092.94 mi (8,196.30 km) |
| Round Rock to Boom | 5,084.94 mi (8,183.42 km) |
| Round Rock to Boortmeerbeek | 5,095.88 mi (8,201.02 km) |
| Round Rock to Borgerhout | 5,083.51 mi (8,181.12 km) |
| Round Rock to Borgloon | 5,131.54 mi (8,258.42 km) |
| Round Rock to Bornem | 5,079.30 mi (8,174.34 km) |
