| Bethesda to Brownsburg (Indiana) | 497.77 mi (801.09 km) |
| Bethesda to Brownsville (Florida) | 927.50 mi (1,492.67 km) |
| Bethesda to Brownsville (Texas) | 1,480.79 mi (2,383.10 km) |
| Bethesda to Brownwood (Texas) | 1,326.12 mi (2,134.18 km) |
| Bethesda to Brunswick (Georgia) | 594.97 mi (957.51 km) |
| Bethesda to Brunswick (Ohio) | 293.33 mi (472.06 km) |
| Bethesda to Brushy Creek (Texas) | 1,304.66 mi (2,099.64 km) |
| Bethesda to Bryan (Texas) | 1,230.97 mi (1,981.06 km) |
| Bethesda to Bryant (Arkansas) | 901.13 mi (1,450.23 km) |
| Bethesda to Bryn Mawr-Skyway (Washington) | 2,311.08 mi (3,719.33 km) |
| Bethesda to Buckeye (Arizona) | 2,004.16 mi (3,225.38 km) |
| Bethesda to Buckhall (Virginia) | 25.35 mi (40.79 km) |
| Bethesda to Bucyrus (Ohio) | 334.66 mi (538.59 km) |
| Bethesda to Buda (Texas) | 1,326.51 mi (2,134.80 km) |
| Bethesda to Buena Park (California) | 2,281.27 mi (3,671.35 km) |
