| Watford to Silver Firs (Washington) | 4,749.72 mi (7,643.94 km) |
| Watford to Silver Spring (Maryland) | 3,645.52 mi (5,866.89 km) |
| Watford to Silver Springs Shores (Florida) | 4,323.55 mi (6,958.09 km) |
| Watford to Silverdale (Washington) | 4,774.93 mi (7,684.51 km) |
| Watford to Silverton (Oregon) | 4,930.36 mi (7,934.64 km) |
| Watford to Simi Valley (California) | 5,428.96 mi (8,737.07 km) |
| Watford to Simpsonville (South Carolina) | 4,058.24 mi (6,531.11 km) |
| Watford to Sioux City (Iowa) | 4,227.19 mi (6,803.00 km) |
| Watford to Sioux Falls (South Dakota) | 4,188.27 mi (6,740.37 km) |
| Watford to Skokie (Illinois) | 3,929.49 mi (6,323.90 km) |
| Watford to Sleepy Hollow (New York) | 3,425.14 mi (5,512.24 km) |
| Watford to Slidell (Louisiana) | 4,583.72 mi (7,376.78 km) |
| Watford to Smithfield (North Carolina) | 3,860.69 mi (6,213.18 km) |
| Watford to Smithfield (Utah) | 4,785.02 mi (7,700.74 km) |
| Watford to Smithville (Missouri) | 4,313.69 mi (6,942.22 km) |
