| Los Alamos to Silver Firs (Washington) | 1,157.55 mi (1,862.89 km) |
| Los Alamos to Silver Spring (Maryland) | 1,612.61 mi (2,595.24 km) |
| Los Alamos to Silver Springs Shores (Florida) | 1,485.20 mi (2,390.19 km) |
| Los Alamos to Silverdale (Washington) | 1,168.22 mi (1,880.07 km) |
| Los Alamos to Silverton (Oregon) | 1,068.25 mi (1,719.18 km) |
| Los Alamos to Simi Valley (California) | 713.07 mi (1,147.58 km) |
| Los Alamos to Simpsonville (South Carolina) | 1,353.80 mi (2,178.74 km) |
| Los Alamos to Sioux City (Iowa) | 698.39 mi (1,123.95 km) |
| Los Alamos to Sioux Falls (South Dakota) | 731.87 mi (1,177.82 km) |
| Los Alamos to Skokie (Illinois) | 1,080.10 mi (1,738.25 km) |
| Los Alamos to Sleepy Hollow (New York) | 1,778.59 mi (2,862.36 km) |
| Los Alamos to Slidell (Louisiana) | 1,029.09 mi (1,656.16 km) |
| Los Alamos to Smithfield (North Carolina) | 1,562.30 mi (2,514.28 km) |
| Los Alamos to Smithfield (Utah) | 507.09 mi (816.09 km) |
| Los Alamos to Smithville (Missouri) | 684.19 mi (1,101.10 km) |
