| Slough to Bollullos par del Condado | 1,021.42 mi (1,643.82 km) |
| Slough to Bormujos | 1,013.06 mi (1,630.37 km) |
| Slough to Brenes | 998.20 mi (1,606.44 km) |
| Slough to Brunete | 784.53 mi (1,262.58 km) |
| Slough to Bueu | 742.56 mi (1,195.03 km) |
| Slough to Bullas | 931.39 mi (1,498.93 km) |
| Slough to Bunol | 835.33 mi (1,344.33 km) |
| Slough to Burela de Cabo | 628.35 mi (1,011.22 km) |
| Slough to Burgos | 650.06 mi (1,046.16 km) |
| Slough to Burjasot | 829.30 mi (1,334.64 km) |
| Slough to Burriana | 803.15 mi (1,292.54 km) |
| Slough to Cabanaquinta | 625.96 mi (1,007.39 km) |
| Slough to Cabanillas del Campo | 761.56 mi (1,225.61 km) |
| Slough to Cabra | 988.17 mi (1,590.30 km) |
| Slough to Caceres | 876.03 mi (1,409.83 km) |
