| Security-Widefield to Silver Firs (Washington) | 1,075.34 mi (1,730.59 km) |
| Security-Widefield to Silver Spring (Maryland) | 1,483.94 mi (2,388.17 km) |
| Security-Widefield to Silver Springs Shores (Florida) | 1,456.11 mi (2,343.38 km) |
| Security-Widefield to Silverdale (Washington) | 1,090.54 mi (1,755.06 km) |
| Security-Widefield to Silverton (Oregon) | 1,022.00 mi (1,644.76 km) |
| Security-Widefield to Simi Valley (California) | 837.58 mi (1,347.96 km) |
| Security-Widefield to Simpsonville (South Carolina) | 1,270.62 mi (2,044.87 km) |
| Security-Widefield to Sioux City (Iowa) | 507.18 mi (816.23 km) |
| Security-Widefield to Sioux Falls (South Dakota) | 530.70 mi (854.08 km) |
| Security-Widefield to Skokie (Illinois) | 919.94 mi (1,480.51 km) |
| Security-Widefield to Sleepy Hollow (New York) | 1,633.75 mi (2,629.26 km) |
| Security-Widefield to Slidell (Louisiana) | 1,029.43 mi (1,656.71 km) |
| Security-Widefield to Smithfield (North Carolina) | 1,464.21 mi (2,356.42 km) |
| Security-Widefield to Smithfield (Utah) | 431.02 mi (693.66 km) |
| Security-Widefield to Smithville (Missouri) | 545.43 mi (877.78 km) |
