| Slupca to Silver Firs (Washington) | 5,126.36 mi (8,250.08 km) |
| Slupca to Silver Spring (Maryland) | 4,337.38 mi (6,980.34 km) |
| Slupca to Silver Springs Shores (Florida) | 5,040.11 mi (8,111.28 km) |
| Slupca to Silverdale (Washington) | 5,148.86 mi (8,286.29 km) |
| Slupca to Silverton (Oregon) | 5,319.35 mi (8,560.66 km) |
| Slupca to Simi Valley (California) | 5,908.52 mi (9,508.85 km) |
| Slupca to Simpsonville (South Carolina) | 4,750.28 mi (7,644.83 km) |
| Slupca to Sioux City (Iowa) | 4,805.98 mi (7,734.48 km) |
| Slupca to Sioux Falls (South Dakota) | 4,758.31 mi (7,657.76 km) |
| Slupca to Skokie (Illinois) | 4,556.38 mi (7,332.79 km) |
| Slupca to Sleepy Hollow (New York) | 4,117.75 mi (6,626.88 km) |
| Slupca to Slidell (Louisiana) | 5,263.18 mi (8,470.27 km) |
| Slupca to Smithfield (North Carolina) | 4,564.58 mi (7,345.98 km) |
| Slupca to Smithfield (Utah) | 5,272.24 mi (8,484.85 km) |
| Slupca to Smithville (Missouri) | 4,921.74 mi (7,920.77 km) |
