| Sioux City to Casamassima | 5,330.50 mi (8,578.61 km) |
| Sioux City to Casandrino | 5,233.43 mi (8,422.40 km) |
| Sioux City to Casapulla | 5,228.20 mi (8,413.97 km) |
| Sioux City to Casarano | 5,422.49 mi (8,726.66 km) |
| Sioux City to Casatenovo | 4,827.79 mi (7,769.57 km) |
| Sioux City to Casciana Terme | 4,975.34 mi (8,007.03 km) |
| Sioux City to Cascina | 4,965.58 mi (7,991.32 km) |
| Sioux City to Caselle Torinese | 4,789.78 mi (7,708.40 km) |
| Sioux City to Caserta | 5,230.05 mi (8,416.95 km) |
| Sioux City to Casier | 4,937.69 mi (7,946.44 km) |
| Sioux City to Casorate Primo | 4,834.23 mi (7,779.95 km) |
| Sioux City to Casoria | 5,236.91 mi (8,427.99 km) |
| Sioux City to Cassano al Ionio | 5,366.46 mi (8,636.49 km) |
| Sioux City to Cassano d'Adda | 4,842.74 mi (7,793.64 km) |
| Sioux City to Cassano delle Murge | 5,328.37 mi (8,575.18 km) |
