| Karlovo to Silver Firs (Washington) | 5,866.92 mi (9,441.89 km) |
| Karlovo to Silver Spring (Maryland) | 4,974.03 mi (8,004.94 km) |
| Karlovo to Silver Springs Shores (Florida) | 5,647.92 mi (9,089.45 km) |
| Karlovo to Silverdale (Washington) | 5,889.30 mi (9,477.92 km) |
| Karlovo to Silverton (Oregon) | 6,060.16 mi (9,752.88 km) |
| Karlovo to Simi Valley (California) | 6,645.19 mi (10,694.40 km) |
| Karlovo to Simpsonville (South Carolina) | 5,386.77 mi (8,669.17 km) |
| Karlovo to Sioux City (Iowa) | 5,515.21 mi (8,875.87 km) |
| Karlovo to Sioux Falls (South Dakota) | 5,470.73 mi (8,804.29 km) |
| Karlovo to Skokie (Illinois) | 5,242.12 mi (8,436.37 km) |
| Karlovo to Sleepy Hollow (New York) | 4,753.65 mi (7,650.27 km) |
| Karlovo to Slidell (Louisiana) | 5,911.84 mi (9,514.18 km) |
| Karlovo to Smithfield (North Carolina) | 5,188.50 mi (8,350.08 km) |
| Karlovo to Smithfield (Utah) | 6,006.85 mi (9,667.09 km) |
| Karlovo to Smithville (Missouri) | 5,618.31 mi (9,041.79 km) |
