| Iowa City to Carlsbad (California) | 1,524.27 mi (2,453.07 km) |
| Iowa City to Carlsbad (New Mexico) | 946.92 mi (1,523.93 km) |
| Iowa City to Carmel (Indiana) | 304.78 mi (490.49 km) |
| Iowa City to Carmichael (California) | 1,579.56 mi (2,542.05 km) |
| Iowa City to Carney (Maryland) | 802.19 mi (1,291.00 km) |
| Iowa City to Carnot-Moon (Pennsylvania) | 593.89 mi (955.77 km) |
| Iowa City to Carol Stream (Illinois) | 176.06 mi (283.35 km) |
| Iowa City to Carolina (Puerto Rico) | 2,200.45 mi (3,541.29 km) |
| Iowa City to Carolina Forest (South Carolina) | 877.53 mi (1,412.25 km) |
| Iowa City to Carpentersville (Illinois) | 169.77 mi (273.21 km) |
| Iowa City to Carpinteria (California) | 1,595.13 mi (2,567.12 km) |
| Iowa City to Carrboro (North Carolina) | 777.14 mi (1,250.69 km) |
| Iowa City to Carroll (Iowa) | 173.93 mi (279.91 km) |
| Iowa City to Carrollton (Georgia) | 659.59 mi (1,061.51 km) |
| Iowa City to Carrollton (Texas) | 667.20 mi (1,073.76 km) |
