| Sofia to Silver Firs (Washington) | 5,835.19 mi (9,390.83 km) |
| Sofia to Silver Spring (Maryland) | 4,911.39 mi (7,904.11 km) |
| Sofia to Silver Springs Shores (Florida) | 5,582.13 mi (8,983.57 km) |
| Sofia to Silverdale (Washington) | 5,857.87 mi (9,427.33 km) |
| Sofia to Silverton (Oregon) | 6,027.52 mi (9,700.36 km) |
| Sofia to Simi Valley (California) | 6,604.14 mi (10,628.34 km) |
| Sofia to Simpsonville (South Carolina) | 5,323.85 mi (8,567.91 km) |
| Sofia to Sioux City (Iowa) | 5,463.72 mi (8,793.01 km) |
| Sofia to Sioux Falls (South Dakota) | 5,420.09 mi (8,722.79 km) |
| Sofia to Skokie (Illinois) | 5,185.93 mi (8,345.94 km) |
| Sofia to Sleepy Hollow (New York) | 4,691.07 mi (7,549.54 km) |
| Sofia to Slidell (Louisiana) | 5,849.98 mi (9,414.64 km) |
| Sofia to Smithfield (North Carolina) | 5,124.43 mi (8,246.97 km) |
| Sofia to Smithfield (Utah) | 5,964.54 mi (9,599.00 km) |
| Sofia to Smithville (Missouri) | 5,563.93 mi (8,954.29 km) |
