| Rapid City to Sinop | 5,954.02 mi (9,582.07 km) |
| Rapid City to Siran | 6,161.73 mi (9,916.34 km) |
| Rapid City to Sirnak | 6,404.59 mi (10,307.19 km) |
| Rapid City to Sirvan | 6,360.70 mi (10,236.56 km) |
| Rapid City to Sivas | 6,138.64 mi (9,879.19 km) |
| Rapid City to Sivasli | 6,020.52 mi (9,689.09 km) |
| Rapid City to Siverek | 6,317.72 mi (10,167.38 km) |
| Rapid City to Sivrice | 6,274.30 mi (10,097.52 km) |
| Rapid City to Sivrihisar | 6,015.13 mi (9,680.41 km) |
| Rapid City to Sogut | 5,944.24 mi (9,566.32 km) |
| Rapid City to Sogutlu | 5,900.59 mi (9,496.08 km) |
| Rapid City to Soke | 5,996.93 mi (9,651.12 km) |
| Rapid City to Solhan | 6,281.98 mi (10,109.88 km) |
| Rapid City to Soma | 5,919.55 mi (9,526.60 km) |
| Rapid City to Sorgun | 6,089.29 mi (9,799.76 km) |
