| Key West to Brown Deer (Wisconsin) | 1,333.08 mi (2,145.39 km) |
| Key West to Brownsburg (Indiana) | 1,088.40 mi (1,751.61 km) |
| Key West to Brownsville (Florida) | 129.49 mi (208.39 km) |
| Key West to Brownsville (Texas) | 984.05 mi (1,583.67 km) |
| Key West to Brownwood (Texas) | 1,156.52 mi (1,861.24 km) |
| Key West to Brunswick (Georgia) | 455.06 mi (732.34 km) |
| Key West to Brunswick (Ohio) | 1,152.64 mi (1,854.99 km) |
| Key West to Brushy Creek (Texas) | 1,059.36 mi (1,704.87 km) |
| Key West to Bryan (Texas) | 987.26 mi (1,588.85 km) |
| Key West to Bryant (Arkansas) | 945.65 mi (1,521.87 km) |
| Key West to Bryn Mawr-Skyway (Washington) | 2,714.37 mi (4,368.36 km) |
| Key West to Buckeye (Arizona) | 1,954.71 mi (3,145.81 km) |
| Key West to Buckhall (Virginia) | 1,010.59 mi (1,626.39 km) |
| Key West to Bucyrus (Ohio) | 1,124.27 mi (1,809.34 km) |
| Key West to Buda (Texas) | 1,056.22 mi (1,699.82 km) |
