| Sioux City to Castelfidardo | 5,085.73 mi (8,184.69 km) |
| Sioux City to Castelfiorentino | 4,984.88 mi (8,022.39 km) |
| Sioux City to Castelfranco di Sopra | 5,005.60 mi (8,055.74 km) |
| Sioux City to Castelfranco di Sotto | 4,972.21 mi (8,002.00 km) |
| Sioux City to Castelfranco Emilia | 4,941.76 mi (7,952.99 km) |
| Sioux City to Castelfranco Veneto | 4,923.84 mi (7,924.16 km) |
| Sioux City to Castellabate | 5,291.46 mi (8,515.78 km) |
| Sioux City to Castellammare del Golfo | 5,322.17 mi (8,565.21 km) |
| Sioux City to Castellammare di Stabia | 5,253.59 mi (8,454.83 km) |
| Sioux City to Castellamonte | 4,783.11 mi (7,697.68 km) |
| Sioux City to Castellana Grotte | 5,342.87 mi (8,598.52 km) |
| Sioux City to Castellaneta | 5,346.85 mi (8,604.93 km) |
| Sioux City to Castellanza | 4,816.42 mi (7,751.27 km) |
| Sioux City to Castellarano | 4,933.30 mi (7,939.38 km) |
| Sioux City to Castelleone | 4,862.46 mi (7,825.37 km) |
