| Iowa City to Cognac | 4,305.08 mi (6,928.35 km) |
| Iowa City to Cogolin | 4,679.01 mi (7,530.15 km) |
| Iowa City to Colmar | 4,513.54 mi (7,263.84 km) |
| Iowa City to Colombes | 4,287.45 mi (6,899.98 km) |
| Iowa City to Colomiers | 4,452.53 mi (7,165.66 km) |
| Iowa City to Combs-la-Ville | 4,308.69 mi (6,934.17 km) |
| Iowa City to Comines | 4,248.19 mi (6,836.80 km) |
| Iowa City to Compiegne | 4,290.97 mi (6,905.64 km) |
| Iowa City to Concarneau | 4,081.98 mi (6,569.31 km) |
| Iowa City to Conde-sur-l'Escaut | 4,281.31 mi (6,890.09 km) |
| Iowa City to Conflans-Sainte-Honorine | 4,278.76 mi (6,885.99 km) |
| Iowa City to Corbas | 4,515.84 mi (7,267.54 km) |
| Iowa City to Corbeil-Essonnes | 4,307.79 mi (6,932.72 km) |
| Iowa City to Cormeilles-en-Parisis | 4,283.64 mi (6,893.85 km) |
| Iowa City to Cosne sur Loire | 4,370.35 mi (7,033.40 km) |
