| Mut to Silver Firs (Washington) | 6,407.50 mi (10,311.87 km) |
| Mut to Silver Spring (Maryland) | 5,591.85 mi (8,999.22 km) |
| Mut to Silver Springs Shores (Florida) | 6,261.74 mi (10,077.30 km) |
| Mut to Silverdale (Washington) | 6,428.50 mi (10,345.68 km) |
| Mut to Silverton (Oregon) | 6,604.04 mi (10,628.17 km) |
| Mut to Simi Valley (California) | 7,221.09 mi (11,621.22 km) |
| Mut to Simpsonville (South Carolina) | 6,004.42 mi (9,663.18 km) |
| Mut to Sioux City (Iowa) | 6,122.74 mi (9,853.60 km) |
| Mut to Sioux Falls (South Dakota) | 6,076.48 mi (9,779.15 km) |
| Mut to Skokie (Illinois) | 5,857.54 mi (9,426.79 km) |
| Mut to Sleepy Hollow (New York) | 5,371.51 mi (8,644.60 km) |
| Mut to Slidell (Louisiana) | 6,530.04 mi (10,509.08 km) |
| Mut to Smithfield (North Carolina) | 5,805.07 mi (9,342.35 km) |
| Mut to Smithfield (Utah) | 6,588.42 mi (10,603.04 km) |
| Mut to Smithville (Missouri) | 6,231.10 mi (10,027.99 km) |
