| Sioux City to Campo de Criptana | 4,605.48 mi (7,411.81 km) |
| Sioux City to Campos del Puerto | 4,862.05 mi (7,824.72 km) |
| Sioux City to Canals | 4,731.69 mi (7,614.92 km) |
| Sioux City to Candelaria | 4,444.31 mi (7,152.42 km) |
| Sioux City to Canet de Mar | 4,750.24 mi (7,644.77 km) |
| Sioux City to Cangas | 4,249.48 mi (6,838.88 km) |
| Sioux City to Cangas de Narcea | 4,310.12 mi (6,936.47 km) |
| Sioux City to Canovellas | 4,736.92 mi (7,623.33 km) |
| Sioux City to Canteras | 4,769.56 mi (7,675.86 km) |
| Sioux City to Cantillana | 4,561.92 mi (7,341.70 km) |
| Sioux City to Capdepera | 4,867.23 mi (7,833.04 km) |
| Sioux City to Carballo | 4,217.99 mi (6,788.19 km) |
| Sioux City to Carcagente | 4,730.60 mi (7,613.16 km) |
| Sioux City to Cardedeu | 4,739.08 mi (7,626.81 km) |
| Sioux City to Carlet | 4,723.12 mi (7,601.13 km) |
