| Upminster to Silver Firs (Washington) | 4,772.08 mi (7,679.92 km) |
| Upminster to Silver Spring (Maryland) | 3,674.02 mi (5,912.76 km) |
| Upminster to Silver Springs Shores (Florida) | 4,352.15 mi (7,004.10 km) |
| Upminster to Silverdale (Washington) | 4,797.23 mi (7,720.39 km) |
| Upminster to Silverton (Oregon) | 4,953.11 mi (7,971.27 km) |
| Upminster to Simi Valley (California) | 5,454.11 mi (8,777.54 km) |
| Upminster to Simpsonville (South Carolina) | 4,086.76 mi (6,577.00 km) |
| Upminster to Sioux City (Iowa) | 4,254.14 mi (6,846.38 km) |
| Upminster to Sioux Falls (South Dakota) | 4,215.05 mi (6,783.46 km) |
| Upminster to Skokie (Illinois) | 3,957.24 mi (6,368.56 km) |
| Upminster to Sleepy Hollow (New York) | 3,453.64 mi (5,558.10 km) |
| Upminster to Slidell (Louisiana) | 4,612.16 mi (7,422.56 km) |
| Upminster to Smithfield (North Carolina) | 3,889.26 mi (6,259.16 km) |
| Upminster to Smithfield (Utah) | 4,810.15 mi (7,741.19 km) |
| Upminster to Smithville (Missouri) | 4,341.19 mi (6,986.47 km) |
