| Iowa City to Cadiz | 4,390.20 mi (7,065.34 km) |
| Iowa City to Calafell | 4,557.25 mi (7,334.18 km) |
| Iowa City to Calahorra | 4,363.80 mi (7,022.86 km) |
| Iowa City to Calasparra | 4,532.78 mi (7,294.80 km) |
| Iowa City to Calatayud | 4,414.28 mi (7,104.09 km) |
| Iowa City to Caldas de Montbuy | 4,565.29 mi (7,347.13 km) |
| Iowa City to Caldas de Reyes | 4,062.98 mi (6,538.73 km) |
| Iowa City to Calella | 4,586.83 mi (7,381.78 km) |
| Iowa City to Callosa de Segura | 4,573.53 mi (7,360.39 km) |
| Iowa City to Calpe | 4,593.45 mi (7,392.45 km) |
| Iowa City to Calvia | 4,663.20 mi (7,504.70 km) |
| Iowa City to Camas | 4,369.20 mi (7,031.56 km) |
| Iowa City to Cambados | 4,059.38 mi (6,532.95 km) |
| Iowa City to Cambre | 4,053.01 mi (6,522.69 km) |
| Iowa City to Cambrils | 4,540.72 mi (7,307.59 km) |
