| Glenmont to Silver Firs (Washington) | 2,306.46 mi (3,711.89 km) |
| Glenmont to Silver Spring (Maryland) | 4.83 mi (7.78 km) |
| Glenmont to Silver Springs Shores (Florida) | 744.06 mi (1,197.45 km) |
| Glenmont to Silverdale (Washington) | 2,331.69 mi (3,752.49 km) |
| Glenmont to Silverton (Oregon) | 2,350.48 mi (3,782.73 km) |
| Glenmont to Simi Valley (California) | 2,314.47 mi (3,724.77 km) |
| Glenmont to Simpsonville (South Carolina) | 415.59 mi (668.82 km) |
| Glenmont to Sioux City (Iowa) | 1,036.82 mi (1,668.60 km) |
| Glenmont to Sioux Falls (South Dakota) | 1,064.41 mi (1,713.01 km) |
| Glenmont to Skokie (Illinois) | 597.10 mi (960.94 km) |
| Glenmont to Sleepy Hollow (New York) | 218.41 mi (351.50 km) |
| Glenmont to Slidell (Louisiana) | 942.64 mi (1,517.03 km) |
| Glenmont to Smithfield (North Carolina) | 255.94 mi (411.90 km) |
| Glenmont to Smithfield (Utah) | 1,825.99 mi (2,938.65 km) |
| Glenmont to Smithville (Missouri) | 936.89 mi (1,507.77 km) |
