| Boston to Bollullos par del Condado | 1,125.01 mi (1,810.53 km) |
| Boston to Bormujos | 1,116.85 mi (1,797.40 km) |
| Boston to Brenes | 1,102.04 mi (1,773.56 km) |
| Boston to Brunete | 888.59 mi (1,430.05 km) |
| Boston to Bueu | 840.34 mi (1,352.39 km) |
| Boston to Bullas | 1,034.18 mi (1,664.36 km) |
| Boston to Bunol | 937.24 mi (1,508.34 km) |
| Boston to Burela de Cabo | 727.11 mi (1,170.17 km) |
| Boston to Burgos | 754.10 mi (1,213.61 km) |
| Boston to Burjasot | 930.70 mi (1,497.82 km) |
| Boston to Burriana | 904.06 mi (1,454.95 km) |
| Boston to Cabanaquinta | 728.46 mi (1,172.35 km) |
| Boston to Cabanillas del Campo | 865.53 mi (1,392.94 km) |
| Boston to Cabra | 1,092.22 mi (1,757.77 km) |
| Boston to Caceres | 979.26 mi (1,575.97 km) |
