| Round Lake Beach to Somersworth (New Hampshire) | 872.06 mi (1,403.44 km) |
| Round Lake Beach to Somerton (Arizona) | 1,599.16 mi (2,573.60 km) |
| Round Lake Beach to Somerville (Massachusetts) | 865.10 mi (1,392.25 km) |
| Round Lake Beach to Somerville (New Jersey) | 707.74 mi (1,139.00 km) |
| Round Lake Beach to Sonoma (California) | 1,819.91 mi (2,928.85 km) |
| Round Lake Beach to Soquel (California) | 1,826.01 mi (2,938.68 km) |
| Round Lake Beach to South Bend (Indiana) | 104.87 mi (168.78 km) |
| Round Lake Beach to South Bradenton (Florida) | 1,076.14 mi (1,731.87 km) |
| Round Lake Beach to South Burlington (Vermont) | 758.42 mi (1,220.57 km) |
| Round Lake Beach to South Charleston (West Virginia) | 435.78 mi (701.32 km) |
| Round Lake Beach to South Daytona (Florida) | 994.47 mi (1,600.44 km) |
| Round Lake Beach to South El Monte (California) | 1,714.95 mi (2,759.95 km) |
| Round Lake Beach to South Elgin (Illinois) | 29.36 mi (47.25 km) |
| Round Lake Beach to South Euclid (Ohio) | 341.96 mi (550.34 km) |
| Round Lake Beach to South Farmingdale (New York) | 764.38 mi (1,230.14 km) |
