| Sioux City to Sentrupert | 5,019.98 mi (8,078.88 km) |
| Sioux City to Sevnica | 5,025.82 mi (8,088.27 km) |
| Sioux City to Sezana | 4,990.64 mi (8,031.66 km) |
| Sioux City to Skocjan | 5,030.30 mi (8,095.49 km) |
| Sioux City to Skofja Loka | 4,983.66 mi (8,020.43 km) |
| Sioux City to Skofljica | 5,001.89 mi (8,049.76 km) |
| Sioux City to Slovenj Gradec | 4,994.07 mi (8,037.18 km) |
| Sioux City to Slovenska Bistrica | 5,016.75 mi (8,073.68 km) |
| Sioux City to Slovenske Konjice | 5,014.07 mi (8,069.36 km) |
| Sioux City to Smarje | 5,022.62 mi (8,083.13 km) |
| Sioux City to Smarjeske Toplice | 5,030.04 mi (8,095.07 km) |
| Sioux City to Smartno | 5,008.36 mi (8,060.18 km) |
| Sioux City to Smartno | 5,001.08 mi (8,048.46 km) |
| Sioux City to Sodrazica | 5,014.59 mi (8,070.21 km) |
| Sioux City to Solcava | 4,985.04 mi (8,022.64 km) |
