| Iowa City to Bougival | 4,285.30 mi (6,896.52 km) |
| Iowa City to Bouguenais | 4,198.84 mi (6,757.38 km) |
| Iowa City to Boulogne-Billancourt | 4,290.29 mi (6,904.56 km) |
| Iowa City to Boulogne-sur-Mer | 4,197.59 mi (6,755.37 km) |
| Iowa City to Bourg-de-Peage | 4,546.92 mi (7,317.56 km) |
| Iowa City to Bourg-en-Bresse | 4,507.26 mi (7,253.73 km) |
| Iowa City to Bourg-la-Reine | 4,295.21 mi (6,912.47 km) |
| Iowa City to Bourg-les-Valence | 4,544.39 mi (7,313.49 km) |
| Iowa City to Bourges | 4,362.04 mi (7,020.03 km) |
| Iowa City to Bourgoin-Jallieu | 4,533.76 mi (7,296.39 km) |
| Iowa City to Bressuire | 4,256.53 mi (6,850.22 km) |
| Iowa City to Brest | 4,041.63 mi (6,504.38 km) |
| Iowa City to Bretigny-sur-Orge | 4,301.11 mi (6,921.97 km) |
| Iowa City to Breuillet | 4,297.62 mi (6,916.34 km) |
| Iowa City to Briancon | 4,615.38 mi (7,427.74 km) |
