| Thornton to Silver Firs (Washington) | 4,596.36 mi (7,397.13 km) |
| Thornton to Silver Spring (Maryland) | 3,544.19 mi (5,703.82 km) |
| Thornton to Silver Springs Shores (Florida) | 4,233.18 mi (6,812.64 km) |
| Thornton to Silverdale (Washington) | 4,621.42 mi (7,437.45 km) |
| Thornton to Silverton (Oregon) | 4,778.04 mi (7,689.52 km) |
| Thornton to Simi Valley (California) | 5,285.75 mi (8,506.59 km) |
| Thornton to Simpsonville (South Carolina) | 3,957.48 mi (6,368.96 km) |
| Thornton to Sioux City (Iowa) | 4,097.04 mi (6,593.55 km) |
| Thornton to Sioux Falls (South Dakota) | 4,056.46 mi (6,528.24 km) |
| Thornton to Skokie (Illinois) | 3,809.11 mi (6,130.16 km) |
| Thornton to Sleepy Hollow (New York) | 3,323.80 mi (5,349.14 km) |
| Thornton to Slidell (Louisiana) | 4,479.14 mi (7,208.47 km) |
| Thornton to Smithfield (North Carolina) | 3,764.35 mi (6,058.13 km) |
| Thornton to Smithfield (Utah) | 4,641.87 mi (7,470.37 km) |
| Thornton to Smithville (Missouri) | 4,189.58 mi (6,742.48 km) |
