| Iowa City to Barberino di Mugello | 4,832.70 mi (7,777.48 km) |
| Iowa City to Barcellona-Pozzo di Gotto | 5,253.75 mi (8,455.09 km) |
| Iowa City to Bareggio | 4,683.07 mi (7,536.67 km) |
| Iowa City to Barga | 4,800.23 mi (7,725.23 km) |
| Iowa City to Bari | 5,179.09 mi (8,334.95 km) |
| Iowa City to Barletta | 5,147.82 mi (8,284.62 km) |
| Iowa City to Baronissi | 5,115.74 mi (8,232.99 km) |
| Iowa City to Barrafranca | 5,249.14 mi (8,447.67 km) |
| Iowa City to Bassano del Grappa | 4,774.75 mi (7,684.22 km) |
| Iowa City to Battipaglia | 5,130.02 mi (8,255.96 km) |
| Iowa City to Beinasco | 4,647.59 mi (7,479.57 km) |
| Iowa City to Bellinzago Novarese | 4,664.71 mi (7,507.13 km) |
| Iowa City to Belluno | 4,776.54 mi (7,687.11 km) |
| Iowa City to Belmonte Mezzagno | 5,184.38 mi (8,343.45 km) |
| Iowa City to Belpasso | 5,270.81 mi (8,482.56 km) |
