| Round Rock to Bicaz | 6,044.24 mi (9,727.27 km) |
| Round Rock to Bistrita | 5,979.39 mi (9,622.90 km) |
| Round Rock to Blaj | 6,004.09 mi (9,662.65 km) |
| Round Rock to Bocsa | 5,962.09 mi (9,595.06 km) |
| Round Rock to Boldesti-Scaeni | 6,132.75 mi (9,869.70 km) |
| Round Rock to Bolintin Vale | 6,151.16 mi (9,899.34 km) |
| Round Rock to Borsa | 5,960.31 mi (9,592.20 km) |
| Round Rock to Botosani | 6,023.09 mi (9,693.23 km) |
| Round Rock to Brad | 5,966.43 mi (9,602.03 km) |
| Round Rock to Bragadiru | 6,162.56 mi (9,917.68 km) |
| Round Rock to Braila | 6,187.64 mi (9,958.04 km) |
| Round Rock to Brasov | 6,087.73 mi (9,797.26 km) |
| Round Rock to Breaza | 6,112.30 mi (9,836.80 km) |
| Round Rock to Bucharest | 6,164.14 mi (9,920.23 km) |
| Round Rock to Buftea | 6,152.08 mi (9,900.82 km) |
