| Sleaford to Silver Firs (Washington) | 4,676.17 mi (7,525.58 km) |
| Sleaford to Silver Spring (Maryland) | 3,616.55 mi (5,820.27 km) |
| Sleaford to Silver Springs Shores (Florida) | 4,302.30 mi (6,923.89 km) |
| Sleaford to Silverdale (Washington) | 4,701.19 mi (7,565.83 km) |
| Sleaford to Silverton (Oregon) | 4,858.11 mi (7,818.37 km) |
| Sleaford to Simi Valley (California) | 5,366.44 mi (8,636.45 km) |
| Sleaford to Simpsonville (South Carolina) | 4,029.74 mi (6,485.23 km) |
| Sleaford to Sioux City (Iowa) | 4,176.30 mi (6,721.10 km) |
| Sleaford to Sioux Falls (South Dakota) | 4,135.98 mi (6,656.22 km) |
| Sleaford to Skokie (Illinois) | 3,886.44 mi (6,254.61 km) |
| Sleaford to Sleepy Hollow (New York) | 3,396.12 mi (5,465.53 km) |
| Sleaford to Slidell (Louisiana) | 4,552.54 mi (7,326.61 km) |
| Sleaford to Smithfield (North Carolina) | 3,835.26 mi (6,172.25 km) |
| Sleaford to Smithfield (Utah) | 4,722.56 mi (7,600.22 km) |
| Sleaford to Smithville (Missouri) | 4,267.73 mi (6,868.25 km) |
