| Sioux City to Castrovillari | 5,360.49 mi (8,626.88 km) |
| Sioux City to Catania | 5,433.23 mi (8,743.94 km) |
| Sioux City to Catanzaro | 5,420.89 mi (8,724.07 km) |
| Sioux City to Cattolica | 5,032.38 mi (8,098.84 km) |
| Sioux City to Cava de' Tirreni | 5,261.49 mi (8,467.55 km) |
| Sioux City to Cavallino | 5,408.59 mi (8,704.28 km) |
| Sioux City to Cavarzere | 4,953.86 mi (7,972.46 km) |
| Sioux City to Cave | 5,141.94 mi (8,275.15 km) |
| Sioux City to Cavriago | 4,918.00 mi (7,914.76 km) |
| Sioux City to Cavriglia | 5,007.84 mi (8,059.35 km) |
| Sioux City to Cazzago San Martino | 4,859.08 mi (7,819.93 km) |
| Sioux City to Ceccano | 5,168.79 mi (8,318.36 km) |
| Sioux City to Cecina | 4,981.33 mi (8,016.67 km) |
| Sioux City to Cefalu | 5,365.79 mi (8,635.40 km) |
| Sioux City to Ceglie Messapico | 5,366.58 mi (8,636.67 km) |
