| Knokke-Heist to Silver Firs (Washington) | 4,861.57 mi (7,823.95 km) |
| Knokke-Heist to Silver Spring (Maryland) | 3,802.03 mi (6,118.77 km) |
| Knokke-Heist to Silver Springs Shores (Florida) | 4,482.31 mi (7,213.58 km) |
| Knokke-Heist to Silverdale (Washington) | 4,886.38 mi (7,863.87 km) |
| Knokke-Heist to Silverton (Oregon) | 5,044.71 mi (8,118.68 km) |
| Knokke-Heist to Simi Valley (California) | 5,558.91 mi (8,946.19 km) |
| Knokke-Heist to Simpsonville (South Carolina) | 4,214.96 mi (6,783.32 km) |
| Knokke-Heist to Sioux City (Iowa) | 4,370.18 mi (7,033.12 km) |
| Knokke-Heist to Sioux Falls (South Dakota) | 4,329.96 mi (6,968.39 km) |
| Knokke-Heist to Skokie (Illinois) | 4,078.71 mi (6,564.04 km) |
| Knokke-Heist to Sleepy Hollow (New York) | 3,581.62 mi (5,764.06 km) |
| Knokke-Heist to Slidell (Louisiana) | 4,739.46 mi (7,627.42 km) |
| Knokke-Heist to Smithfield (North Carolina) | 4,018.38 mi (6,466.95 km) |
| Knokke-Heist to Smithfield (Utah) | 4,915.10 mi (7,910.09 km) |
| Knokke-Heist to Smithville (Missouri) | 4,460.81 mi (7,178.99 km) |
