| Kardzhali to Silver Firs (Washington) | 5,941.29 mi (9,561.58 km) |
| Kardzhali to Silver Spring (Maryland) | 5,038.35 mi (8,108.44 km) |
| Kardzhali to Silver Springs Shores (Florida) | 5,709.02 mi (9,187.78 km) |
| Kardzhali to Silverdale (Washington) | 5,963.67 mi (9,597.60 km) |
| Kardzhali to Silverton (Oregon) | 6,134.55 mi (9,872.60 km) |
| Kardzhali to Simi Valley (California) | 6,719.07 mi (10,813.29 km) |
| Kardzhali to Simpsonville (South Carolina) | 5,450.84 mi (8,772.28 km) |
| Kardzhali to Sioux City (Iowa) | 5,586.36 mi (8,990.38 km) |
| Kardzhali to Sioux Falls (South Dakota) | 5,542.20 mi (8,919.31 km) |
| Kardzhali to Skokie (Illinois) | 5,311.04 mi (8,547.29 km) |
| Kardzhali to Sleepy Hollow (New York) | 4,818.02 mi (7,753.86 km) |
| Kardzhali to Slidell (Louisiana) | 5,976.85 mi (9,618.81 km) |
| Kardzhali to Smithfield (North Carolina) | 5,251.46 mi (8,451.41 km) |
| Kardzhali to Smithfield (Utah) | 6,080.52 mi (9,785.66 km) |
| Kardzhali to Smithville (Missouri) | 5,688.19 mi (9,154.25 km) |
