| Rapid City to San Luis Obispo (California) | 1,106.04 mi (1,780.00 km) |
| Rapid City to San Marcos (California) | 1,064.22 mi (1,712.69 km) |
| Rapid City to San Marcos (Texas) | 1,022.87 mi (1,646.15 km) |
| Rapid City to San Marino (California) | 1,050.74 mi (1,691.01 km) |
| Rapid City to San Mateo (California) | 1,091.89 mi (1,757.23 km) |
| Rapid City to San Pablo (California) | 1,079.27 mi (1,736.92 km) |
| Rapid City to San Rafael (California) | 1,086.90 mi (1,749.20 km) |
| Rapid City to San Ramon (California) | 1,066.83 mi (1,716.89 km) |
| Rapid City to San Tan Valley (Arizona) | 875.97 mi (1,409.73 km) |
| Rapid City to Sand Springs (Oklahoma) | 663.61 mi (1,067.98 km) |
| Rapid City to Sandusky (Ohio) | 1,053.68 mi (1,695.74 km) |
| Rapid City to Sandy (Oregon) | 937.24 mi (1,508.34 km) |
| Rapid City to Sandy (Utah) | 502.50 mi (808.69 km) |
| Rapid City to Sandy Springs (Georgia) | 1,226.01 mi (1,973.08 km) |
| Rapid City to Sanford (Florida) | 1,604.17 mi (2,581.66 km) |
