| Iowa City to Cromer | 4,108.56 mi (6,612.08 km) |
| Iowa City to Crosby | 3,932.52 mi (6,328.77 km) |
| Iowa City to Crowborough | 4,131.32 mi (6,648.71 km) |
| Iowa City to Croxley Green | 4,088.48 mi (6,579.77 km) |
| Iowa City to Croydon | 4,110.39 mi (6,615.03 km) |
| Iowa City to Cudworth | 3,988.64 mi (6,419.09 km) |
| Iowa City to Culcheth | 3,952.39 mi (6,360.76 km) |
| Iowa City to Cullercoats | 3,941.59 mi (6,343.37 km) |
| Iowa City to Cumbernauld | 3,823.88 mi (6,153.94 km) |
| Iowa City to Cumnock | 3,828.67 mi (6,161.65 km) |
| Iowa City to Cupar | 3,847.23 mi (6,191.52 km) |
| Iowa City to Cwmbran | 3,991.48 mi (6,423.67 km) |
| Iowa City to Dagenham | 4,114.04 mi (6,620.90 km) |
| Iowa City to Dalkeith | 3,858.11 mi (6,209.03 km) |
| Iowa City to Darfield | 3,991.17 mi (6,423.16 km) |
