| Boortmeerbeek to Silver Firs (Washington) | 4,913.68 mi (7,907.80 km) |
| Boortmeerbeek to Silver Spring (Maryland) | 3,862.68 mi (6,216.38 km) |
| Boortmeerbeek to Silver Springs Shores (Florida) | 4,542.49 mi (7,310.43 km) |
| Boortmeerbeek to Silverdale (Washington) | 4,938.37 mi (7,947.54 km) |
| Boortmeerbeek to Silverton (Oregon) | 5,097.46 mi (8,203.57 km) |
| Boortmeerbeek to Simi Valley (California) | 5,615.53 mi (9,037.33 km) |
| Boortmeerbeek to Simpsonville (South Carolina) | 4,275.59 mi (6,880.90 km) |
| Boortmeerbeek to Sioux City (Iowa) | 4,429.59 mi (7,128.73 km) |
| Boortmeerbeek to Sioux Falls (South Dakota) | 4,389.14 mi (7,063.63 km) |
| Boortmeerbeek to Skokie (Illinois) | 4,139.05 mi (6,661.15 km) |
| Boortmeerbeek to Sleepy Hollow (New York) | 3,642.27 mi (5,861.67 km) |
| Boortmeerbeek to Slidell (Louisiana) | 4,800.16 mi (7,725.11 km) |
| Boortmeerbeek to Smithfield (North Carolina) | 4,078.87 mi (6,564.31 km) |
| Boortmeerbeek to Smithfield (Utah) | 4,971.81 mi (8,001.36 km) |
| Boortmeerbeek to Smithville (Missouri) | 4,520.88 mi (7,275.65 km) |
