| Round Lake Beach to Silver Firs (Washington) | 1,688.95 mi (2,718.11 km) |
| Round Lake Beach to Silver Spring (Maryland) | 624.03 mi (1,004.29 km) |
| Round Lake Beach to Silver Springs Shores (Florida) | 977.02 mi (1,572.36 km) |
| Round Lake Beach to Silverdale (Washington) | 1,713.76 mi (2,758.03 km) |
| Round Lake Beach to Silverton (Oregon) | 1,729.68 mi (2,783.66 km) |
| Round Lake Beach to Simi Valley (California) | 1,743.18 mi (2,805.38 km) |
| Round Lake Beach to Simpsonville (South Carolina) | 614.80 mi (989.43 km) |
| Round Lake Beach to Sioux City (Iowa) | 423.60 mi (681.72 km) |
| Round Lake Beach to Sioux Falls (South Dakota) | 444.46 mi (715.29 km) |
| Round Lake Beach to Skokie (Illinois) | 29.44 mi (47.38 km) |
| Round Lake Beach to Sleepy Hollow (New York) | 737.07 mi (1,186.21 km) |
| Round Lake Beach to Slidell (Louisiana) | 840.67 mi (1,352.92 km) |
| Round Lake Beach to Smithfield (North Carolina) | 705.18 mi (1,134.87 km) |
| Round Lake Beach to Smithfield (Utah) | 1,213.80 mi (1,953.43 km) |
| Round Lake Beach to Smithville (Missouri) | 396.88 mi (638.72 km) |
