| Houston to Ayamonte | 4,909.65 mi (7,901.32 km) |
| Houston to Azcoitia | 4,987.50 mi (8,026.61 km) |
| Houston to Azpeitia | 4,989.50 mi (8,029.83 km) |
| Houston to Azuqueca de Henares | 5,017.78 mi (8,075.34 km) |
| Houston to Badajoz | 4,884.86 mi (7,861.42 km) |
| Houston to Badalona | 5,249.02 mi (8,447.48 km) |
| Houston to Baena | 5,052.17 mi (8,130.68 km) |
| Houston to Baeza | 5,083.45 mi (8,181.02 km) |
| Houston to Bailen | 5,065.73 mi (8,152.51 km) |
| Houston to Balaguer | 5,172.12 mi (8,323.73 km) |
| Houston to Banolas | 5,251.38 mi (8,451.28 km) |
| Houston to Baranain | 5,028.02 mi (8,091.81 km) |
| Houston to Barbadanes | 4,749.78 mi (7,644.03 km) |
| Houston to Barbastro | 5,133.30 mi (8,261.24 km) |
| Houston to Barcelona | 5,248.05 mi (8,445.92 km) |
