| Sioux City to Spello | 5,076.47 mi (8,169.79 km) |
| Sioux City to Spilamberto | 4,943.38 mi (7,955.60 km) |
| Sioux City to Spilimbergo | 4,935.99 mi (7,943.72 km) |
| Sioux City to Spinea | 4,940.05 mi (7,950.24 km) |
| Sioux City to Spoleto | 5,087.99 mi (8,188.33 km) |
| Sioux City to Spoltore | 5,155.77 mi (8,297.40 km) |
| Sioux City to Spresiano | 4,929.69 mi (7,933.56 km) |
| Sioux City to Squinzano | 5,397.31 mi (8,686.13 km) |
| Sioux City to Statte | 5,359.86 mi (8,625.87 km) |
| Sioux City to Stezzano | 4,842.37 mi (7,793.04 km) |
| Sioux City to Strada | 4,998.59 mi (8,044.45 km) |
| Sioux City to Stradella | 4,855.22 mi (7,813.72 km) |
| Sioux City to Striano | 5,250.86 mi (8,450.44 km) |
| Sioux City to Subiaco | 5,142.56 mi (8,276.14 km) |
| Sioux City to Sulmona | 5,167.56 mi (8,316.38 km) |
