| Sioux City to Cervignano del Friuli | 4,966.17 mi (7,992.28 km) |
| Sioux City to Cesa | 5,231.19 mi (8,418.79 km) |
| Sioux City to Cesano Maderno | 4,824.77 mi (7,764.72 km) |
| Sioux City to Cesena | 5,006.52 mi (8,057.22 km) |
| Sioux City to Cesenatico | 5,009.09 mi (8,061.35 km) |
| Sioux City to Cetraro | 5,366.89 mi (8,637.18 km) |
| Sioux City to Cherasco | 4,821.56 mi (7,759.55 km) |
| Sioux City to Chiampo | 4,905.97 mi (7,895.40 km) |
| Sioux City to Chiaravalle | 5,071.54 mi (8,161.85 km) |
| Sioux City to Chiari | 4,856.72 mi (7,816.14 km) |
| Sioux City to Chiavari | 4,891.31 mi (7,871.81 km) |
| Sioux City to Chieri | 4,803.63 mi (7,730.69 km) |
| Sioux City to Chieti | 5,161.81 mi (8,307.13 km) |
| Sioux City to Chioggia | 4,957.06 mi (7,977.62 km) |
| Sioux City to Chiusi | 5,048.54 mi (8,124.85 km) |
