| McDonough to Silver Firs (Washington) | 2,197.83 mi (3,537.07 km) |
| McDonough to Silver Spring (Maryland) | 552.53 mi (889.21 km) |
| McDonough to Silver Springs Shores (Florida) | 324.46 mi (522.16 km) |
| McDonough to Silverdale (Washington) | 2,219.05 mi (3,571.22 km) |
| McDonough to Silverton (Oregon) | 2,191.84 mi (3,527.43 km) |
| McDonough to Simi Valley (California) | 1,976.46 mi (3,180.80 km) |
| McDonough to Simpsonville (South Carolina) | 140.26 mi (225.72 km) |
| McDonough to Sioux City (Iowa) | 912.55 mi (1,468.61 km) |
| McDonough to Sioux Falls (South Dakota) | 972.46 mi (1,565.02 km) |
| McDonough to Skokie (Illinois) | 625.33 mi (1,006.37 km) |
| McDonough to Sleepy Hollow (New York) | 772.96 mi (1,243.95 km) |
| McDonough to Slidell (Louisiana) | 395.67 mi (636.76 km) |
| McDonough to Smithfield (North Carolina) | 360.06 mi (579.45 km) |
| McDonough to Smithfield (Utah) | 1,612.83 mi (2,595.60 km) |
| McDonough to Smithville (Missouri) | 709.89 mi (1,142.46 km) |
