| Sioux City to Corato | 5,301.83 mi (8,532.47 km) |
| Sioux City to Corbetta | 4,823.79 mi (7,763.14 km) |
| Sioux City to Corciano | 5,055.34 mi (8,135.78 km) |
| Sioux City to Cordenons | 4,936.27 mi (7,944.15 km) |
| Sioux City to Cori | 5,149.40 mi (8,287.16 km) |
| Sioux City to Coriano | 5,027.55 mi (8,091.06 km) |
| Sioux City to Corigliano Calabro | 5,382.96 mi (8,663.03 km) |
| Sioux City to Corleone | 5,348.63 mi (8,607.79 km) |
| Sioux City to Cormano | 4,829.19 mi (7,771.83 km) |
| Sioux City to Cornaredo | 4,826.56 mi (7,767.60 km) |
| Sioux City to Cornate d'Adda | 4,835.63 mi (7,782.19 km) |
| Sioux City to Cornedo Vicentino | 4,905.29 mi (7,894.29 km) |
| Sioux City to Correggio | 4,923.86 mi (7,924.18 km) |
| Sioux City to Corridonia | 5,094.90 mi (8,199.44 km) |
| Sioux City to Corsico | 4,832.64 mi (7,777.37 km) |
