| Iowa City to Cockermouth | 3,884.43 mi (6,251.39 km) |
| Iowa City to Colchester | 4,130.02 mi (6,646.62 km) |
| Iowa City to Coleford | 4,002.28 mi (6,441.05 km) |
| Iowa City to Colne | 3,952.21 mi (6,360.46 km) |
| Iowa City to Colwyn Bay | 3,914.17 mi (6,299.25 km) |
| Iowa City to Congleton | 3,972.79 mi (6,393.59 km) |
| Iowa City to Conisbrough | 3,998.68 mi (6,435.25 km) |
| Iowa City to Connahs Quay | 3,940.13 mi (6,341.03 km) |
| Iowa City to Consett | 3,933.29 mi (6,330.02 km) |
| Iowa City to Conwy | 3,909.68 mi (6,292.03 km) |
| Iowa City to Cookstown | 3,762.26 mi (6,054.77 km) |
| Iowa City to Corby | 4,050.59 mi (6,518.80 km) |
| Iowa City to Corfe Mullen | 4,058.78 mi (6,531.98 km) |
| Iowa City to Corsham | 4,030.29 mi (6,486.12 km) |
| Iowa City to Coseley | 3,997.49 mi (6,433.35 km) |
