| Boom to Azcoitia | 629.29 mi (1,012.74 km) |
| Boom to Azpeitia | 628.07 mi (1,010.78 km) |
| Boom to Azuqueca de Henares | 813.41 mi (1,309.05 km) |
| Boom to Badajoz | 1,006.48 mi (1,619.77 km) |
| Boom to Badalona | 674.42 mi (1,085.37 km) |
| Boom to Baena | 1,022.91 mi (1,646.21 km) |
| Boom to Baeza | 982.57 mi (1,581.30 km) |
| Boom to Bailen | 981.91 mi (1,580.24 km) |
| Boom to Balaguer | 663.88 mi (1,068.41 km) |
| Boom to Banolas | 623.95 mi (1,004.14 km) |
| Boom to Baranain | 638.66 mi (1,027.83 km) |
| Boom to Barbadanes | 838.45 mi (1,349.35 km) |
| Boom to Barbastro | 656.47 mi (1,056.49 km) |
| Boom to Barcelona | 678.30 mi (1,091.62 km) |
| Boom to Bargas | 869.12 mi (1,398.71 km) |
