| Sioux City to Castelletto sopra Ticino | 4,802.14 mi (7,728.30 km) |
| Sioux City to Castelli Calepio | 4,852.15 mi (7,808.79 km) |
| Sioux City to Castelnovo ne' Monti | 4,925.40 mi (7,926.66 km) |
| Sioux City to Castelnuovo Berardenga | 5,016.55 mi (8,073.35 km) |
| Sioux City to Castelnuovo di Porto | 5,110.74 mi (8,224.93 km) |
| Sioux City to Castelnuovo di Verona | 4,892.73 mi (7,874.09 km) |
| Sioux City to Castelnuovo Rangone | 4,939.56 mi (7,949.45 km) |
| Sioux City to Castelvetrano | 5,335.36 mi (8,586.43 km) |
| Sioux City to Castelvetro di Modena | 4,942.49 mi (7,954.16 km) |
| Sioux City to Castenaso | 4,961.03 mi (7,984.00 km) |
| Sioux City to Castenedolo | 4,874.00 mi (7,843.94 km) |
| Sioux City to Castiglion Fiorentino | 5,032.00 mi (8,098.22 km) |
| Sioux City to Castiglione del Lago | 5,046.41 mi (8,121.41 km) |
| Sioux City to Castiglione delle Stiviere | 4,884.60 mi (7,861.01 km) |
| Sioux City to Castrolibero | 5,385.28 mi (8,666.77 km) |
