| Thornton Heath to Silver Firs (Washington) | 4,771.20 mi (7,678.51 km) |
| Thornton Heath to Silver Spring (Maryland) | 3,662.79 mi (5,894.69 km) |
| Thornton Heath to Silver Springs Shores (Florida) | 4,339.62 mi (6,983.94 km) |
| Thornton Heath to Silverdale (Washington) | 4,796.42 mi (7,719.08 km) |
| Thornton Heath to Silverton (Oregon) | 4,951.81 mi (7,969.16 km) |
| Thornton Heath to Simi Valley (California) | 5,449.93 mi (8,770.82 km) |
| Thornton Heath to Simpsonville (South Carolina) | 4,075.43 mi (6,558.76 km) |
| Thornton Heath to Sioux City (Iowa) | 4,247.17 mi (6,835.16 km) |
| Thornton Heath to Sioux Falls (South Dakota) | 4,208.40 mi (6,772.76 km) |
| Thornton Heath to Skokie (Illinois) | 3,948.62 mi (6,354.68 km) |
| Thornton Heath to Sleepy Hollow (New York) | 3,442.44 mi (5,540.08 km) |
| Thornton Heath to Slidell (Louisiana) | 4,601.26 mi (7,405.01 km) |
| Thornton Heath to Smithfield (North Carolina) | 3,877.43 mi (6,240.12 km) |
| Thornton Heath to Smithfield (Utah) | 4,805.99 mi (7,734.49 km) |
| Thornton Heath to Smithville (Missouri) | 4,333.14 mi (6,973.52 km) |
