| Iowa City to Cocentaina | 4,568.13 mi (7,351.70 km) |
| Iowa City to Coin | 4,456.28 mi (7,171.69 km) |
| Iowa City to Colindres | 4,259.77 mi (6,855.44 km) |
| Iowa City to Collado-Villalba | 4,337.94 mi (6,981.24 km) |
| Iowa City to Colmenar Viejo | 4,347.65 mi (6,996.86 km) |
| Iowa City to Colmenarejo | 4,340.29 mi (6,985.02 km) |
| Iowa City to Conil de la Frontera | 4,410.41 mi (7,097.88 km) |
| Iowa City to Consuegra | 4,400.11 mi (7,081.29 km) |
| Iowa City to Corbera de Llobregat | 4,563.96 mi (7,344.98 km) |
| Iowa City to Cordoba | 4,407.87 mi (7,093.78 km) |
| Iowa City to Coria del Rio | 4,372.96 mi (7,037.60 km) |
| Iowa City to Crevillente | 4,571.65 mi (7,357.35 km) |
| Iowa City to Cuarte de Huerva | 4,436.14 mi (7,139.27 km) |
| Iowa City to Cubellas | 4,561.29 mi (7,340.69 km) |
| Iowa City to Cuellar | 4,295.90 mi (6,913.59 km) |
