| Boise to Brownsburg (Indiana) | 1,552.58 mi (2,498.64 km) |
| Boise to Brownsville (Florida) | 2,357.78 mi (3,794.47 km) |
| Boise to Brownsville (Texas) | 1,608.85 mi (2,589.19 km) |
| Boise to Brownwood (Texas) | 1,246.58 mi (2,006.17 km) |
| Boise to Brunswick (Georgia) | 2,073.91 mi (3,337.64 km) |
| Boise to Brunswick (Ohio) | 1,749.99 mi (2,816.34 km) |
| Boise to Brushy Creek (Texas) | 1,357.13 mi (2,184.08 km) |
| Boise to Bryan (Texas) | 1,405.74 mi (2,262.33 km) |
| Boise to Bryant (Arkansas) | 1,409.30 mi (2,268.04 km) |
| Boise to Bryn Mawr-Skyway (Washington) | 395.98 mi (637.27 km) |
| Boise to Buckeye (Arizona) | 728.70 mi (1,172.73 km) |
| Boise to Buckhall (Virginia) | 2,026.48 mi (3,261.31 km) |
| Boise to Bucyrus (Ohio) | 1,701.71 mi (2,738.63 km) |
| Boise to Buda (Texas) | 1,374.90 mi (2,212.68 km) |
| Boise to Buena Park (California) | 679.90 mi (1,094.20 km) |
