| Iowa City to Brown Deer (Wisconsin) | 209.49 mi (337.14 km) |
| Iowa City to Brownsburg (Indiana) | 297.34 mi (478.52 km) |
| Iowa City to Brownsville (Florida) | 1,269.22 mi (2,042.61 km) |
| Iowa City to Brownsville (Texas) | 1,133.37 mi (1,823.98 km) |
| Iowa City to Brownwood (Texas) | 800.62 mi (1,288.47 km) |
| Iowa City to Brunswick (Georgia) | 915.18 mi (1,472.84 km) |
| Iowa City to Brunswick (Ohio) | 503.40 mi (810.15 km) |
| Iowa City to Brushy Creek (Texas) | 843.75 mi (1,357.88 km) |
| Iowa City to Bryan (Texas) | 805.79 mi (1,296.79 km) |
| Iowa City to Bryant (Arkansas) | 489.25 mi (787.37 km) |
| Iowa City to Bryn Mawr-Skyway (Washington) | 1,553.20 mi (2,499.63 km) |
| Iowa City to Buckeye (Arizona) | 1,284.00 mi (2,066.39 km) |
| Iowa City to Buckhall (Virginia) | 769.41 mi (1,238.25 km) |
| Iowa City to Bucyrus (Ohio) | 448.39 mi (721.61 km) |
| Iowa City to Buda (Texas) | 874.18 mi (1,406.86 km) |
