| Sliven to Silver Firs (Washington) | 5,892.24 mi (9,482.64 km) |
| Sliven to Silver Spring (Maryland) | 5,034.06 mi (8,101.53 km) |
| Sliven to Silver Springs Shores (Florida) | 5,711.61 mi (9,191.95 km) |
| Sliven to Silverdale (Washington) | 5,914.30 mi (9,518.15 km) |
| Sliven to Silverton (Oregon) | 6,086.40 mi (9,795.11 km) |
| Sliven to Simi Valley (California) | 6,680.40 mi (10,751.07 km) |
| Sliven to Simpsonville (South Carolina) | 5,447.05 mi (8,766.18 km) |
| Sliven to Sioux City (Iowa) | 5,562.32 mi (8,951.68 km) |
| Sliven to Sioux Falls (South Dakota) | 5,516.90 mi (8,878.59 km) |
| Sliven to Skokie (Illinois) | 5,294.61 mi (8,520.86 km) |
| Sliven to Sleepy Hollow (New York) | 4,813.64 mi (7,746.80 km) |
| Sliven to Slidell (Louisiana) | 5,970.78 mi (9,609.04 km) |
| Sliven to Smithfield (North Carolina) | 5,250.18 mi (8,449.34 km) |
| Sliven to Smithfield (Utah) | 6,043.63 mi (9,726.29 km) |
| Sliven to Smithville (Missouri) | 5,668.65 mi (9,122.82 km) |
