| Sioux City to Busto Arsizio | 4,814.86 mi (7,748.77 km) |
| Sioux City to Busto Garolfo | 4,819.03 mi (7,755.48 km) |
| Sioux City to Cabras | 5,061.79 mi (8,146.17 km) |
| Sioux City to Cadelbosco di Sopra | 4,917.37 mi (7,913.74 km) |
| Sioux City to Cadoneghe | 4,933.93 mi (7,940.40 km) |
| Sioux City to Cagli | 5,049.07 mi (8,125.69 km) |
| Sioux City to Cagliari | 5,117.32 mi (8,235.52 km) |
| Sioux City to Cairo Montenotte | 4,847.76 mi (7,801.71 km) |
| Sioux City to Caivano | 5,234.48 mi (8,424.08 km) |
| Sioux City to Calcinaia | 4,968.05 mi (7,995.30 km) |
| Sioux City to Calcinato | 4,878.84 mi (7,851.73 km) |
| Sioux City to Calderara di Reno | 4,950.95 mi (7,967.79 km) |
| Sioux City to Caldogno | 4,911.24 mi (7,903.88 km) |
| Sioux City to Calenzano | 4,979.85 mi (8,014.29 km) |
| Sioux City to Calolziocorte | 4,827.62 mi (7,769.30 km) |
