| Sioux City to Cognac | 4,462.85 mi (7,182.27 km) |
| Sioux City to Cogolin | 4,833.19 mi (7,778.26 km) |
| Sioux City to Colmar | 4,651.20 mi (7,485.38 km) |
| Sioux City to Colombes | 4,430.45 mi (7,130.13 km) |
| Sioux City to Colomiers | 4,614.28 mi (7,425.97 km) |
| Sioux City to Combs-la-Ville | 4,452.09 mi (7,164.95 km) |
| Sioux City to Comines | 4,383.63 mi (7,054.77 km) |
| Sioux City to Compiegne | 4,431.40 mi (7,131.65 km) |
| Sioux City to Concarneau | 4,237.72 mi (6,819.95 km) |
| Sioux City to Conde-sur-l'Escaut | 4,416.96 mi (7,108.42 km) |
| Sioux City to Conflans-Sainte-Honorine | 4,421.74 mi (7,116.10 km) |
| Sioux City to Corbas | 4,665.34 mi (7,508.14 km) |
| Sioux City to Corbeil-Essonnes | 4,451.50 mi (7,164.00 km) |
| Sioux City to Cormeilles-en-Parisis | 4,426.55 mi (7,123.85 km) |
| Sioux City to Cosne sur Loire | 4,517.41 mi (7,270.08 km) |
