| Williamstown to Siloam Springs (Arkansas) | 1,090.28 mi (1,754.64 km) |
| Williamstown to Silver Firs (Washington) | 2,380.91 mi (3,831.71 km) |
| Williamstown to Silver Spring (Maryland) | 118.92 mi (191.39 km) |
| Williamstown to Silver Springs Shores (Florida) | 832.82 mi (1,340.30 km) |
| Williamstown to Silverdale (Washington) | 2,406.65 mi (3,873.13 km) |
| Williamstown to Silverton (Oregon) | 2,432.66 mi (3,914.99 km) |
| Williamstown to Simi Valley (California) | 2,420.68 mi (3,895.71 km) |
| Williamstown to Simpsonville (South Carolina) | 526.73 mi (847.69 km) |
| Williamstown to Sioux City (Iowa) | 1,128.57 mi (1,816.26 km) |
| Williamstown to Sioux Falls (South Dakota) | 1,151.15 mi (1,852.60 km) |
| Williamstown to Skokie (Illinois) | 685.58 mi (1,103.34 km) |
| Williamstown to Sleepy Hollow (New York) | 113.27 mi (182.28 km) |
| Williamstown to Slidell (Louisiana) | 1,057.72 mi (1,702.24 km) |
| Williamstown to Smithfield (North Carolina) | 342.32 mi (550.91 km) |
| Williamstown to Smithfield (Utah) | 1,919.29 mi (3,088.81 km) |
