| Iowa City to Cortona | 4,893.47 mi (7,875.28 km) |
| Iowa City to Cosenza | 5,240.88 mi (8,434.38 km) |
| Iowa City to Cossato | 4,647.41 mi (7,479.29 km) |
| Iowa City to Costa Volpino | 4,710.31 mi (7,580.51 km) |
| Iowa City to Creazzo | 4,775.43 mi (7,685.32 km) |
| Iowa City to Crema | 4,714.16 mi (7,586.70 km) |
| Iowa City to Cremona | 4,737.50 mi (7,624.27 km) |
| Iowa City to Crevalcore | 4,798.17 mi (7,721.91 km) |
| Iowa City to Crispiano | 5,217.84 mi (8,397.30 km) |
| Iowa City to Crosia | 5,248.53 mi (8,446.69 km) |
| Iowa City to Crotone | 5,285.02 mi (8,505.42 km) |
| Iowa City to Cuneo | 4,672.61 mi (7,519.84 km) |
| Iowa City to Cuorgne | 4,634.73 mi (7,458.88 km) |
| Iowa City to Cusano Milanino | 4,687.24 mi (7,543.38 km) |
| Iowa City to Cutro | 5,282.17 mi (8,500.82 km) |
