| Iowa City to Benisa | 4,591.04 mi (7,388.57 km) |
| Iowa City to Berga | 4,533.16 mi (7,295.41 km) |
| Iowa City to Berja | 4,531.47 mi (7,292.69 km) |
| Iowa City to Bermeo | 4,289.60 mi (6,903.45 km) |
| Iowa City to Berriozar | 4,356.16 mi (7,010.57 km) |
| Iowa City to Betanzos | 4,058.49 mi (6,531.51 km) |
| Iowa City to Betera | 4,533.55 mi (7,296.04 km) |
| Iowa City to Bilbao | 4,287.24 mi (6,899.65 km) |
| Iowa City to Binefar | 4,477.72 mi (7,206.19 km) |
| Iowa City to Binisalem | 4,672.46 mi (7,519.60 km) |
| Iowa City to Blanes | 4,589.90 mi (7,386.73 km) |
| Iowa City to Boadilla del Monte | 4,352.33 mi (7,004.41 km) |
| Iowa City to Boiro | 4,049.81 mi (6,517.55 km) |
| Iowa City to Bolanos de Calatrava | 4,417.37 mi (7,109.07 km) |
| Iowa City to Bollullos de la Mitacion | 4,367.24 mi (7,028.39 km) |
