| Loudoun Valley Estates to Silver Firs (Washington) | 2,288.44 mi (3,682.89 km) |
| Loudoun Valley Estates to Silver Spring (Maryland) | 26.09 mi (41.98 km) |
| Loudoun Valley Estates to Silver Springs Shores (Florida) | 728.55 mi (1,172.49 km) |
| Loudoun Valley Estates to Silverdale (Washington) | 2,313.57 mi (3,723.33 km) |
| Loudoun Valley Estates to Silverton (Oregon) | 2,330.93 mi (3,751.28 km) |
| Loudoun Valley Estates to Simi Valley (California) | 2,290.50 mi (3,686.20 km) |
| Loudoun Valley Estates to Simpsonville (South Carolina) | 393.79 mi (633.75 km) |
| Loudoun Valley Estates to Sioux City (Iowa) | 1,015.79 mi (1,634.76 km) |
| Loudoun Valley Estates to Sioux Falls (South Dakota) | 1,044.39 mi (1,680.78 km) |
| Loudoun Valley Estates to Skokie (Illinois) | 577.25 mi (928.99 km) |
| Loudoun Valley Estates to Sleepy Hollow (New York) | 241.47 mi (388.61 km) |
| Loudoun Valley Estates to Slidell (Louisiana) | 919.06 mi (1,479.08 km) |
| Loudoun Valley Estates to Smithfield (North Carolina) | 243.78 mi (392.32 km) |
| Loudoun Valley Estates to Smithfield (Utah) | 1,804.40 mi (2,903.91 km) |
| Loudoun Valley Estates to Smithville (Missouri) | 913.25 mi (1,469.73 km) |
