| Horsforth to Silver Firs (Washington) | 4,599.17 mi (7,401.64 km) |
| Horsforth to Silver Spring (Maryland) | 3,551.45 mi (5,715.50 km) |
| Horsforth to Silver Springs Shores (Florida) | 4,240.86 mi (6,825.00 km) |
| Horsforth to Silverdale (Washington) | 4,624.19 mi (7,441.92 km) |
| Horsforth to Silverton (Oregon) | 4,781.04 mi (7,694.35 km) |
| Horsforth to Simi Valley (California) | 5,290.02 mi (8,513.47 km) |
| Horsforth to Simpsonville (South Carolina) | 3,964.75 mi (6,380.65 km) |
| Horsforth to Sioux City (Iowa) | 4,102.57 mi (6,602.45 km) |
| Horsforth to Sioux Falls (South Dakota) | 4,061.86 mi (6,536.93 km) |
| Horsforth to Skokie (Illinois) | 3,815.34 mi (6,140.19 km) |
| Horsforth to Sleepy Hollow (New York) | 3,331.06 mi (5,360.83 km) |
| Horsforth to Slidell (Louisiana) | 4,486.21 mi (7,219.86 km) |
| Horsforth to Smithfield (North Carolina) | 3,771.81 mi (6,070.14 km) |
| Horsforth to Smithfield (Utah) | 4,646.17 mi (7,477.29 km) |
| Horsforth to Smithville (Missouri) | 4,195.55 mi (6,752.09 km) |
