| Sioux City to Cadiz | 4,584.12 mi (7,377.43 km) |
| Sioux City to Calafell | 4,725.86 mi (7,605.54 km) |
| Sioux City to Calahorra | 4,534.78 mi (7,298.02 km) |
| Sioux City to Calasparra | 4,715.08 mi (7,588.19 km) |
| Sioux City to Calatayud | 4,587.58 mi (7,383.00 km) |
| Sioux City to Caldas de Montbuy | 4,731.65 mi (7,614.86 km) |
| Sioux City to Caldas de Reyes | 4,242.88 mi (6,828.26 km) |
| Sioux City to Calella | 4,752.41 mi (7,648.27 km) |
| Sioux City to Callosa de Segura | 4,754.83 mi (7,652.16 km) |
| Sioux City to Calpe | 4,771.82 mi (7,679.50 km) |
| Sioux City to Calvia | 4,834.95 mi (7,781.10 km) |
| Sioux City to Camas | 4,560.42 mi (7,339.29 km) |
| Sioux City to Cambados | 4,239.84 mi (6,823.36 km) |
| Sioux City to Cambre | 4,230.34 mi (6,808.08 km) |
| Sioux City to Cambrils | 4,710.56 mi (7,580.92 km) |
