| Horw to Silver Firs (Washington) | 5,235.99 mi (8,426.51 km) |
| Horw to Silver Spring (Maryland) | 4,129.69 mi (6,646.09 km) |
| Horw to Silver Springs Shores (Florida) | 4,792.40 mi (7,712.63 km) |
| Horw to Silverdale (Washington) | 5,260.70 mi (8,466.28 km) |
| Horw to Silverton (Oregon) | 5,419.54 mi (8,721.91 km) |
| Horw to Simi Valley (California) | 5,931.98 mi (9,546.60 km) |
| Horw to Simpsonville (South Carolina) | 4,541.01 mi (7,308.06 km) |
| Horw to Sioux City (Iowa) | 4,732.60 mi (7,616.38 km) |
| Horw to Sioux Falls (South Dakota) | 4,694.01 mi (7,554.28 km) |
| Horw to Skokie (Illinois) | 4,430.58 mi (7,130.32 km) |
| Horw to Sleepy Hollow (New York) | 3,909.76 mi (6,292.15 km) |
| Horw to Slidell (Louisiana) | 5,070.09 mi (8,159.52 km) |
| Horw to Smithfield (North Carolina) | 4,338.49 mi (6,982.13 km) |
| Horw to Smithfield (Utah) | 5,288.07 mi (8,510.33 km) |
| Horw to Smithville (Missouri) | 4,816.77 mi (7,751.85 km) |
