| Fort Thomas to Silver Firs (Washington) | 1,963.03 mi (3,159.20 km) |
| Fort Thomas to Silver Spring (Maryland) | 398.71 mi (641.66 km) |
| Fort Thomas to Silver Springs Shores (Florida) | 702.58 mi (1,130.69 km) |
| Fort Thomas to Silverdale (Washington) | 1,986.91 mi (3,197.62 km) |
| Fort Thomas to Silverton (Oregon) | 1,989.46 mi (3,201.72 km) |
| Fort Thomas to Simi Valley (California) | 1,917.85 mi (3,086.48 km) |
| Fort Thomas to Simpsonville (South Carolina) | 324.16 mi (521.68 km) |
| Fort Thomas to Sioux City (Iowa) | 666.90 mi (1,073.27 km) |
| Fort Thomas to Sioux Falls (South Dakota) | 706.91 mi (1,137.66 km) |
| Fort Thomas to Skokie (Illinois) | 267.36 mi (430.27 km) |
| Fort Thomas to Sleepy Hollow (New York) | 575.89 mi (926.80 km) |
| Fort Thomas to Slidell (Louisiana) | 678.41 mi (1,091.80 km) |
| Fort Thomas to Smithfield (North Carolina) | 416.05 mi (669.56 km) |
| Fort Thomas to Smithfield (Utah) | 1,445.46 mi (2,326.24 km) |
| Fort Thomas to Smithville (Missouri) | 541.88 mi (872.07 km) |
