| Round Rock to Ayamonte | 4,995.84 mi (8,040.02 km) |
| Round Rock to Azcoitia | 5,057.88 mi (8,139.88 km) |
| Round Rock to Azpeitia | 5,059.84 mi (8,143.03 km) |
| Round Rock to Azuqueca de Henares | 5,094.26 mi (8,198.42 km) |
| Round Rock to Badajoz | 4,967.41 mi (7,994.27 km) |
| Round Rock to Badalona | 5,319.47 mi (8,560.87 km) |
| Round Rock to Baena | 5,135.30 mi (8,264.46 km) |
| Round Rock to Baeza | 5,165.22 mi (8,312.62 km) |
| Round Rock to Bailen | 5,147.54 mi (8,284.16 km) |
| Round Rock to Balaguer | 5,243.00 mi (8,437.80 km) |
| Round Rock to Banolas | 5,320.02 mi (8,561.75 km) |
| Round Rock to Baranain | 5,098.72 mi (8,205.59 km) |
| Round Rock to Barbadanes | 4,825.88 mi (7,766.50 km) |
| Round Rock to Barbastro | 5,204.21 mi (8,375.36 km) |
| Round Rock to Barcelona | 5,318.65 mi (8,559.54 km) |
