| Sioux City to Brezovica | 4,994.63 mi (8,038.07 km) |
| Sioux City to Cankova | 5,015.92 mi (8,072.35 km) |
| Sioux City to Celje | 5,013.66 mi (8,068.70 km) |
| Sioux City to Cerklje na Gorenjskem | 4,986.09 mi (8,024.34 km) |
| Sioux City to Cerknica | 5,003.25 mi (8,051.95 km) |
| Sioux City to Cerkno | 4,974.69 mi (8,005.99 km) |
| Sioux City to Cerkvenjak | 5,020.79 mi (8,080.19 km) |
| Sioux City to Cirkulane | 5,033.29 mi (8,100.30 km) |
| Sioux City to Crensovci | 5,032.26 mi (8,098.64 km) |
| Sioux City to Crna na Koroskem | 4,988.07 mi (8,027.53 km) |
| Sioux City to Crnomelj | 5,042.93 mi (8,115.81 km) |
| Sioux City to Destrnik | 5,022.22 mi (8,082.49 km) |
| Sioux City to Divaca | 4,995.15 mi (8,038.91 km) |
| Sioux City to Dobje | 5,022.78 mi (8,083.38 km) |
| Sioux City to Dobrna | 5,007.43 mi (8,058.68 km) |
