| Apex to Silver Firs (Washington) | 2,345.72 mi (3,775.07 km) |
| Apex to Silver Spring (Maryland) | 248.36 mi (399.70 km) |
| Apex to Silver Springs Shores (Florida) | 492.06 mi (791.89 km) |
| Apex to Silverdale (Washington) | 2,369.35 mi (3,813.10 km) |
| Apex to Silverton (Oregon) | 2,367.38 mi (3,809.93 km) |
| Apex to Simi Valley (California) | 2,243.62 mi (3,610.76 km) |
| Apex to Simpsonville (South Carolina) | 202.90 mi (326.54 km) |
| Apex to Sioux City (Iowa) | 1,046.41 mi (1,684.03 km) |
| Apex to Sioux Falls (South Dakota) | 1,089.61 mi (1,753.57 km) |
| Apex to Skokie (Illinois) | 645.56 mi (1,038.93 km) |
| Apex to Sleepy Hollow (New York) | 459.16 mi (738.95 km) |
| Apex to Slidell (Louisiana) | 734.50 mi (1,182.06 km) |
| Apex to Smithfield (North Carolina) | 32.87 mi (52.89 km) |
| Apex to Smithfield (Utah) | 1,812.50 mi (2,916.93 km) |
| Apex to Smithville (Missouri) | 895.17 mi (1,440.64 km) |
