| Sioux City to Cehegin | 4,716.67 mi (7,590.74 km) |
| Sioux City to Cervello | 4,733.34 mi (7,617.58 km) |
| Sioux City to Cervera | 4,693.86 mi (7,554.04 km) |
| Sioux City to Ceuti | 4,739.87 mi (7,628.08 km) |
| Sioux City to Cheste | 4,705.50 mi (7,572.77 km) |
| Sioux City to Chiclana de la Frontera | 4,595.57 mi (7,395.85 km) |
| Sioux City to Chipiona | 4,569.94 mi (7,354.61 km) |
| Sioux City to Chiva | 4,704.36 mi (7,570.94 km) |
| Sioux City to Churriana de la Vega | 4,675.87 mi (7,525.08 km) |
| Sioux City to Ciempozuelos | 4,552.89 mi (7,327.17 km) |
| Sioux City to Cieza | 4,726.78 mi (7,607.01 km) |
| Sioux City to Cisterniga | 4,448.95 mi (7,159.89 km) |
| Sioux City to Ciudad de Melilla | 4,785.72 mi (7,701.87 km) |
| Sioux City to Ciudad Real | 4,588.26 mi (7,384.09 km) |
| Sioux City to Ciudad-Rodrigo | 4,410.16 mi (7,097.46 km) |
