| Iowa City to Castelfidardo | 4,944.93 mi (7,958.09 km) |
| Iowa City to Castelfiorentino | 4,839.65 mi (7,788.67 km) |
| Iowa City to Castelfranco di Sopra | 4,861.54 mi (7,823.89 km) |
| Iowa City to Castelfranco di Sotto | 4,826.89 mi (7,768.12 km) |
| Iowa City to Castelfranco Emilia | 4,799.65 mi (7,724.29 km) |
| Iowa City to Castelfranco Veneto | 4,786.57 mi (7,703.24 km) |
| Iowa City to Castellabate | 5,144.42 mi (8,279.14 km) |
| Iowa City to Castellammare del Golfo | 5,164.98 mi (8,312.23 km) |
| Iowa City to Castellammare di Stabia | 5,106.76 mi (8,218.54 km) |
| Iowa City to Castellamonte | 4,637.47 mi (7,463.29 km) |
| Iowa City to Castellana Grotte | 5,201.93 mi (8,371.70 km) |
| Iowa City to Castellaneta | 5,204.76 mi (8,376.25 km) |
| Iowa City to Castellanza | 4,673.56 mi (7,521.38 km) |
| Iowa City to Castellarano | 4,790.61 mi (7,709.75 km) |
| Iowa City to Castelleone | 4,720.14 mi (7,596.33 km) |
