| Key West to Blue Island (Illinois) | 1,228.66 mi (1,977.34 km) |
| Key West to Blue Springs (Missouri) | 1,236.23 mi (1,989.51 km) |
| Key West to Bluffdale (Utah) | 2,056.87 mi (3,310.21 km) |
| Key West to Bluffton (Indiana) | 1,134.87 mi (1,826.39 km) |
| Key West to Bluffton (South Carolina) | 531.00 mi (854.57 km) |
| Key West to Blythe (California) | 2,069.17 mi (3,330.01 km) |
| Key West to Blytheville (Arkansas) | 922.27 mi (1,484.26 km) |
| Key West to Boca Raton (Florida) | 162.79 mi (261.99 km) |
| Key West to Boerne (Texas) | 1,101.27 mi (1,772.32 km) |
| Key West to Bogalusa (Louisiana) | 654.82 mi (1,053.83 km) |
| Key West to Boiling Springs (South Carolina) | 724.25 mi (1,165.57 km) |
| Key West to Boise (Idaho) | 2,343.90 mi (3,772.15 km) |
| Key West to Bolingbrook (Illinois) | 1,237.65 mi (1,991.80 km) |
| Key West to Bolivar (Missouri) | 1,132.09 mi (1,821.92 km) |
| Key West to Bon Air (Virginia) | 928.76 mi (1,494.69 km) |
