| Iowa City to Bucak | 5,866.17 mi (9,440.69 km) |
| Iowa City to Buharkent | 5,774.50 mi (9,293.17 km) |
| Iowa City to Bulancak | 5,923.46 mi (9,532.89 km) |
| Iowa City to Bulanik | 6,147.89 mi (9,894.07 km) |
| Iowa City to Buldan | 5,773.25 mi (9,291.15 km) |
| Iowa City to Bunyan | 5,966.54 mi (9,602.22 km) |
| Iowa City to Burdur | 5,841.44 mi (9,400.88 km) |
| Iowa City to Burhaniye | 5,630.92 mi (9,062.09 km) |
| Iowa City to Bursa | 5,668.49 mi (9,122.56 km) |
| Iowa City to Buyukcekmece | 5,608.50 mi (9,026.00 km) |
| Iowa City to Buyukorhan | 5,686.67 mi (9,151.81 km) |
| Iowa City to Buyukyoncali | 5,567.57 mi (8,960.14 km) |
| Iowa City to Caglayancerit | 6,073.64 mi (9,774.57 km) |
| Iowa City to Cal | 5,791.21 mi (9,320.05 km) |
| Iowa City to Caldiran | 6,192.10 mi (9,965.23 km) |
