| Herk-de-Stad to Silver Firs (Washington) | 4,930.89 mi (7,935.51 km) |
| Herk-de-Stad to Silver Spring (Maryland) | 3,888.01 mi (6,257.15 km) |
| Herk-de-Stad to Silver Springs Shores (Florida) | 4,568.33 mi (7,352.02 km) |
| Herk-de-Stad to Silverdale (Washington) | 4,955.51 mi (7,975.13 km) |
| Herk-de-Stad to Silverton (Oregon) | 5,115.09 mi (8,231.94 km) |
| Herk-de-Stad to Simi Valley (California) | 5,635.84 mi (9,070.01 km) |
| Herk-de-Stad to Simpsonville (South Carolina) | 4,300.96 mi (6,921.73 km) |
| Herk-de-Stad to Sioux City (Iowa) | 4,452.32 mi (7,165.32 km) |
| Herk-de-Stad to Sioux Falls (South Dakota) | 4,411.64 mi (7,099.85 km) |
| Herk-de-Stad to Skokie (Illinois) | 4,162.94 mi (6,699.61 km) |
| Herk-de-Stad to Sleepy Hollow (New York) | 3,667.60 mi (5,902.43 km) |
| Herk-de-Stad to Slidell (Louisiana) | 4,825.32 mi (7,765.60 km) |
| Herk-de-Stad to Smithfield (North Carolina) | 4,104.46 mi (6,605.48 km) |
| Herk-de-Stad to Smithfield (Utah) | 4,992.20 mi (8,034.17 km) |
| Herk-de-Stad to Smithville (Missouri) | 4,544.37 mi (7,313.45 km) |
