| Iowa City to Carmona | 4,385.02 mi (7,057.02 km) |
| Iowa City to Cartagena | 4,589.86 mi (7,386.67 km) |
| Iowa City to Cartama | 4,460.01 mi (7,177.69 km) |
| Iowa City to Cartaya | 4,322.42 mi (6,956.26 km) |
| Iowa City to Caspe | 4,487.59 mi (7,222.08 km) |
| Iowa City to Cassa de la Selva | 4,584.68 mi (7,378.32 km) |
| Iowa City to Castalla | 4,563.89 mi (7,344.87 km) |
| Iowa City to Castellbisbal | 4,563.71 mi (7,344.59 km) |
| Iowa City to Castelldefels | 4,571.34 mi (7,356.87 km) |
| Iowa City to Castello de Ampurias | 4,578.21 mi (7,367.92 km) |
| Iowa City to Castellon de la Plana | 4,536.78 mi (7,301.24 km) |
| Iowa City to Castilleja de la Cuesta | 4,369.15 mi (7,031.46 km) |
| Iowa City to Catarroja | 4,543.58 mi (7,312.19 km) |
| Iowa City to Catral | 4,575.38 mi (7,363.36 km) |
| Iowa City to Caudete | 4,545.60 mi (7,315.44 km) |
