| Round Rock to Bilecik | 6,514.36 mi (10,483.84 km) |
| Round Rock to Bingol | 6,937.71 mi (11,165.16 km) |
| Round Rock to Birecik | 6,958.35 mi (11,198.39 km) |
| Round Rock to Bitlis | 7,015.10 mi (11,289.71 km) |
| Round Rock to Bodrum | 6,572.39 mi (10,577.24 km) |
| Round Rock to Bogazliyan | 6,748.63 mi (10,860.88 km) |
| Round Rock to Bolu | 6,542.19 mi (10,528.64 km) |
| Round Rock to Bolvadin | 6,625.48 mi (10,662.68 km) |
| Round Rock to Bor | 6,794.62 mi (10,934.89 km) |
| Round Rock to Borcka | 6,833.63 mi (10,997.66 km) |
| Round Rock to Boyabat | 6,611.76 mi (10,640.60 km) |
| Round Rock to Bozdogan | 6,575.47 mi (10,582.20 km) |
| Round Rock to Bozkir | 6,747.47 mi (10,859.00 km) |
| Round Rock to Bozkurt | 6,617.89 mi (10,650.46 km) |
| Round Rock to Bozuyuk | 6,528.30 mi (10,506.28 km) |
