| Frederick to Brown Deer (Wisconsin) | 605.43 mi (974.34 km) |
| Frederick to Brownsburg (Indiana) | 477.85 mi (769.02 km) |
| Frederick to Brownsville (Florida) | 954.64 mi (1,536.34 km) |
| Frederick to Brownsville (Texas) | 1,483.74 mi (2,387.84 km) |
| Frederick to Brownwood (Texas) | 1,319.65 mi (2,123.76 km) |
| Frederick to Brunswick (Georgia) | 616.60 mi (992.32 km) |
| Frederick to Brunswick (Ohio) | 263.62 mi (424.26 km) |
| Frederick to Brushy Creek (Texas) | 1,301.08 mi (2,093.89 km) |
| Frederick to Bryan (Texas) | 1,228.39 mi (1,976.91 km) |
| Frederick to Bryant (Arkansas) | 894.43 mi (1,439.45 km) |
| Frederick to Bryn Mawr-Skyway (Washington) | 2,282.15 mi (3,672.76 km) |
| Frederick to Buckeye (Arizona) | 1,988.56 mi (3,200.28 km) |
| Frederick to Buckhall (Virginia) | 49.08 mi (78.98 km) |
| Frederick to Bucyrus (Ohio) | 308.50 mi (496.48 km) |
| Frederick to Buda (Texas) | 1,323.51 mi (2,129.98 km) |
