| Sioux City to Coudekerque-Branche | 4,351.17 mi (7,002.53 km) |
| Sioux City to Coueron | 4,348.24 mi (6,997.81 km) |
| Sioux City to Coulommiers | 4,465.37 mi (7,186.32 km) |
| Sioux City to Courbevoic | 4,431.53 mi (7,131.86 km) |
| Sioux City to Courcouronnes | 4,449.15 mi (7,160.22 km) |
| Sioux City to Cournon-d'Auvergne | 4,597.41 mi (7,398.81 km) |
| Sioux City to Courrieres | 4,393.67 mi (7,070.92 km) |
| Sioux City to Coutras | 4,497.27 mi (7,237.66 km) |
| Sioux City to Couzeix | 4,516.54 mi (7,268.66 km) |
| Sioux City to Cran-Gevrier | 4,700.28 mi (7,564.38 km) |
| Sioux City to Craponne | 4,655.28 mi (7,491.94 km) |
| Sioux City to Creil | 4,425.37 mi (7,121.95 km) |
| Sioux City to Crepy-en-Valois | 4,441.09 mi (7,147.24 km) |
| Sioux City to Crest | 4,710.51 mi (7,580.83 km) |
| Sioux City to Creteil | 4,443.58 mi (7,151.25 km) |
