| Westchester to Siloam Springs (Arkansas) | 1,104.86 mi (1,778.11 km) |
| Westchester to Silver Firs (Washington) | 2,722.91 mi (4,382.10 km) |
| Westchester to Silver Spring (Maryland) | 936.09 mi (1,506.48 km) |
| Westchester to Silver Springs Shores (Florida) | 253.89 mi (408.60 km) |
| Westchester to Silverdale (Washington) | 2,742.03 mi (4,412.87 km) |
| Westchester to Silverton (Oregon) | 2,693.85 mi (4,335.34 km) |
| Westchester to Simi Valley (California) | 2,356.66 mi (3,792.68 km) |
| Westchester to Simpsonville (South Carolina) | 630.85 mi (1,015.26 km) |
| Westchester to Sioux City (Iowa) | 1,471.27 mi (2,367.78 km) |
| Westchester to Sioux Falls (South Dakota) | 1,535.95 mi (2,471.87 km) |
| Westchester to Skokie (Illinois) | 1,201.35 mi (1,933.39 km) |
| Westchester to Sleepy Hollow (New York) | 1,123.39 mi (1,807.91 km) |
| Westchester to Slidell (Louisiana) | 654.87 mi (1,053.92 km) |
| Westchester to Smithfield (North Carolina) | 685.15 mi (1,102.65 km) |
| Westchester to Smithfield (Utah) | 2,103.65 mi (3,385.49 km) |
