| Round Lake Beach to Superior (Colorado) | 902.70 mi (1,452.76 km) |
| Round Lake Beach to Superior (Wisconsin) | 357.27 mi (574.96 km) |
| Round Lake Beach to Surprise (Arizona) | 1,449.32 mi (2,332.45 km) |
| Round Lake Beach to Susanville (California) | 1,681.18 mi (2,705.59 km) |
| Round Lake Beach to Sussex (Wisconsin) | 52.69 mi (84.80 km) |
| Round Lake Beach to Suwanee (Georgia) | 615.08 mi (989.87 km) |
| Round Lake Beach to Swansea (Illinois) | 282.81 mi (455.14 km) |
| Round Lake Beach to Sweetwater (Florida) | 1,227.47 mi (1,975.42 km) |
| Round Lake Beach to Sweetwater (Texas) | 960.53 mi (1,545.82 km) |
| Round Lake Beach to Sycamore (Illinois) | 40.60 mi (65.34 km) |
| Round Lake Beach to Sylacauga (Alabama) | 643.42 mi (1,035.48 km) |
| Round Lake Beach to Sylvania (Ohio) | 229.01 mi (368.56 km) |
| Round Lake Beach to Syosset (New York) | 760.04 mi (1,223.16 km) |
| Round Lake Beach to Syracuse (New York) | 607.26 mi (977.29 km) |
| Round Lake Beach to Syracuse (Utah) | 1,236.00 mi (1,989.15 km) |
