| Sioux City to Chojnice | 4,729.46 mi (7,611.32 km) |
| Sioux City to Chojnow | 4,795.54 mi (7,717.68 km) |
| Sioux City to Chorzow | 4,936.50 mi (7,944.53 km) |
| Sioux City to Choszczno | 4,690.31 mi (7,548.32 km) |
| Sioux City to Chrzanow | 4,958.66 mi (7,980.20 km) |
| Sioux City to Ciechanow | 4,860.49 mi (7,822.20 km) |
| Sioux City to Ciechocinek | 4,805.30 mi (7,733.38 km) |
| Sioux City to Cieszyn | 4,953.63 mi (7,972.10 km) |
| Sioux City to Czarna Bialostocka | 4,914.34 mi (7,908.86 km) |
| Sioux City to Czarnkow | 4,737.90 mi (7,624.91 km) |
| Sioux City to Czechowice-Dziedzice | 4,957.29 mi (7,977.99 km) |
| Sioux City to Czeladz | 4,939.00 mi (7,948.55 km) |
| Sioux City to Czersk Pomorski | 4,737.55 mi (7,624.35 km) |
| Sioux City to Czestochowa | 4,917.08 mi (7,913.27 km) |
| Sioux City to Czluchow | 4,725.60 mi (7,605.12 km) |
