| Smolyan to Silver Firs (Washington) | 5,933.03 mi (9,548.29 km) |
| Smolyan to Silver Spring (Maryland) | 5,013.73 mi (8,068.82 km) |
| Smolyan to Silver Springs Shores (Florida) | 5,682.48 mi (9,145.07 km) |
| Smolyan to Silverdale (Washington) | 5,955.55 mi (9,584.54 km) |
| Smolyan to Silverton (Oregon) | 6,125.84 mi (9,858.59 km) |
| Smolyan to Simi Valley (California) | 6,706.13 mi (10,792.47 km) |
| Smolyan to Simpsonville (South Carolina) | 5,426.05 mi (8,732.38 km) |
| Smolyan to Sioux City (Iowa) | 5,567.96 mi (8,960.76 km) |
| Smolyan to Sioux Falls (South Dakota) | 5,524.25 mi (8,890.42 km) |
| Smolyan to Skokie (Illinois) | 5,290.08 mi (8,513.56 km) |
| Smolyan to Sleepy Hollow (New York) | 4,793.45 mi (7,714.32 km) |
| Smolyan to Slidell (Louisiana) | 5,952.65 mi (9,579.87 km) |
| Smolyan to Smithfield (North Carolina) | 5,225.99 mi (8,410.42 km) |
| Smolyan to Smithfield (Utah) | 6,066.93 mi (9,763.78 km) |
| Smolyan to Smithville (Missouri) | 5,668.22 mi (9,122.12 km) |
