| Fort Madison to Brown Deer (Wisconsin) | 247.49 mi (398.30 km) |
| Fort Madison to Brownsburg (Indiana) | 267.61 mi (430.67 km) |
| Fort Madison to Brownsville (Florida) | 1,205.08 mi (1,939.38 km) |
| Fort Madison to Brownsville (Texas) | 1,069.39 mi (1,721.02 km) |
| Fort Madison to Brownwood (Texas) | 747.47 mi (1,202.93 km) |
| Fort Madison to Brunswick (Georgia) | 855.73 mi (1,377.16 km) |
| Fort Madison to Brunswick (Ohio) | 499.12 mi (803.26 km) |
| Fort Madison to Brushy Creek (Texas) | 784.69 mi (1,262.84 km) |
| Fort Madison to Bryan (Texas) | 743.24 mi (1,196.12 km) |
| Fort Madison to Bryant (Arkansas) | 419.60 mi (675.28 km) |
| Fort Madison to Bryn Mawr-Skyway (Washington) | 1,593.59 mi (2,564.63 km) |
| Fort Madison to Buckeye (Arizona) | 1,271.02 mi (2,045.50 km) |
| Fort Madison to Buckhall (Virginia) | 750.09 mi (1,207.16 km) |
| Fort Madison to Bucyrus (Ohio) | 438.84 mi (706.25 km) |
| Fort Madison to Buda (Texas) | 814.82 mi (1,311.32 km) |
