| Sioux City to Solofra | 5,260.55 mi (8,466.04 km) |
| Sioux City to Somma Lombardo | 4,806.09 mi (7,734.65 km) |
| Sioux City to Somma Vesuviana | 5,243.33 mi (8,438.32 km) |
| Sioux City to Sommacampagna | 4,897.28 mi (7,881.40 km) |
| Sioux City to Sona | 4,895.14 mi (7,877.96 km) |
| Sioux City to Sondrio | 4,826.68 mi (7,767.79 km) |
| Sioux City to Sora | 5,172.09 mi (8,323.68 km) |
| Sioux City to Sorbolo | 4,908.17 mi (7,898.93 km) |
| Sioux City to Soresina | 4,866.39 mi (7,831.70 km) |
| Sioux City to Sorisole | 4,838.56 mi (7,786.92 km) |
| Sioux City to Sorrento | 5,252.87 mi (8,453.68 km) |
| Sioux City to Sorso | 5,023.65 mi (8,084.78 km) |
| Sioux City to Sortino | 5,447.49 mi (8,766.89 km) |
| Sioux City to Soverato Marina | 5,429.82 mi (8,738.45 km) |
| Sioux City to Sovicille | 5,009.51 mi (8,062.03 km) |
