| Iowa City to Coudekerque-Branche | 4,215.75 mi (6,784.59 km) |
| Iowa City to Coueron | 4,193.40 mi (6,748.63 km) |
| Iowa City to Coulommiers | 4,323.28 mi (6,957.64 km) |
| Iowa City to Courbevoic | 4,288.44 mi (6,901.58 km) |
| Iowa City to Courcouronnes | 4,305.39 mi (6,928.86 km) |
| Iowa City to Cournon-d'Auvergne | 4,445.35 mi (7,154.09 km) |
| Iowa City to Courrieres | 4,257.06 mi (6,851.08 km) |
| Iowa City to Coutras | 4,337.69 mi (6,980.84 km) |
| Iowa City to Couzeix | 4,361.78 mi (7,019.61 km) |
| Iowa City to Cran-Gevrier | 4,553.53 mi (7,328.20 km) |
| Iowa City to Craponne | 4,505.72 mi (7,251.25 km) |
| Iowa City to Creil | 4,283.87 mi (6,894.23 km) |
| Iowa City to Crepy-en-Valois | 4,300.13 mi (6,920.39 km) |
| Iowa City to Crest | 4,558.26 mi (7,335.81 km) |
| Iowa City to Creteil | 4,300.44 mi (6,920.90 km) |
