| Round Lake Beach to South Plainfield (New Jersey) | 717.51 mi (1,154.72 km) |
| Round Lake Beach to South Portland (Maine) | 901.37 mi (1,450.62 km) |
| Round Lake Beach to South Riding (Virginia) | 603.04 mi (970.49 km) |
| Round Lake Beach to South River (New Jersey) | 721.67 mi (1,161.41 km) |
| Round Lake Beach to South Salt Lake (Utah) | 1,233.05 mi (1,984.40 km) |
| Round Lake Beach to South San Francisco (California) | 1,833.28 mi (2,950.37 km) |
| Round Lake Beach to South San Jose Hills (California) | 1,708.92 mi (2,750.24 km) |
| Round Lake Beach to South Sioux City (Nebraska) | 424.81 mi (683.67 km) |
| Round Lake Beach to South St. Paul (Minnesota) | 302.51 mi (486.84 km) |
| Round Lake Beach to South Valley (New Mexico) | 1,121.57 mi (1,805.00 km) |
| Round Lake Beach to South Venice (Florida) | 1,106.62 mi (1,780.93 km) |
| Round Lake Beach to South Whittier (California) | 1,717.91 mi (2,764.71 km) |
| Round Lake Beach to South Yarmouth (Massachusetts) | 917.37 mi (1,476.36 km) |
| Round Lake Beach to Southaven (Mississippi) | 523.27 mi (842.13 km) |
| Round Lake Beach to Southchase (Florida) | 1,037.25 mi (1,669.29 km) |
