| Sioux City to Sesimbra | 4,382.50 mi (7,052.95 km) |
| Sioux City to Setubal | 4,388.55 mi (7,062.69 km) |
| Sioux City to Sever do Vouga | 4,325.75 mi (6,961.62 km) |
| Sioux City to Silves | 4,461.80 mi (7,180.57 km) |
| Sioux City to Sines | 4,412.24 mi (7,100.81 km) |
| Sioux City to Sintra | 4,355.75 mi (7,009.91 km) |
| Sioux City to Sobrado de Paiva | 4,318.54 mi (6,950.02 km) |
| Sioux City to Sobral de Monte Agraco | 4,357.73 mi (7,013.09 km) |
| Sioux City to Soure | 4,340.52 mi (6,985.39 km) |
| Sioux City to Tabua | 4,354.86 mi (7,008.48 km) |
| Sioux City to Tavira | 4,499.99 mi (7,242.03 km) |
| Sioux City to Tomar | 4,367.51 mi (7,028.83 km) |
| Sioux City to Tondela | 4,346.44 mi (6,994.92 km) |
| Sioux City to Torre de Moncorvo | 4,360.98 mi (7,018.32 km) |
| Sioux City to Torres Novas | 4,367.58 mi (7,028.94 km) |
