| Cal to Silver Firs (Washington) | 6,245.70 mi (10,051.49 km) |
| Cal to Silver Spring (Maryland) | 5,359.38 mi (8,625.09 km) |
| Cal to Silver Springs Shores (Florida) | 6,024.24 mi (9,695.08 km) |
| Cal to Silverdale (Washington) | 6,267.56 mi (10,086.66 km) |
| Cal to Silverton (Oregon) | 6,440.37 mi (10,364.77 km) |
| Cal to Simi Valley (California) | 7,036.74 mi (11,324.54 km) |
| Cal to Simpsonville (South Carolina) | 5,771.42 mi (9,288.21 km) |
| Cal to Sioux City (Iowa) | 5,912.14 mi (9,514.67 km) |
| Cal to Sioux Falls (South Dakota) | 5,867.70 mi (9,443.16 km) |
| Cal to Skokie (Illinois) | 5,636.96 mi (9,071.81 km) |
| Cal to Sleepy Hollow (New York) | 5,139.18 mi (8,270.71 km) |
| Cal to Slidell (Louisiana) | 6,298.76 mi (10,136.88 km) |
| Cal to Smithfield (North Carolina) | 5,570.26 mi (8,964.46 km) |
| Cal to Smithfield (Utah) | 6,399.79 mi (10,299.46 km) |
| Cal to Smithville (Missouri) | 6,014.36 mi (9,679.18 km) |
