| Round Lake Beach to Southern Pines (North Carolina) | 681.13 mi (1,096.17 km) |
| Round Lake Beach to Southfield (Michigan) | 245.91 mi (395.75 km) |
| Round Lake Beach to Southgate (Michigan) | 249.44 mi (401.43 km) |
| Round Lake Beach to Southlake (Texas) | 817.51 mi (1,315.66 km) |
| Round Lake Beach to Spanaway (Washington) | 1,702.40 mi (2,739.74 km) |
| Round Lake Beach to Spanish Fork (Utah) | 1,229.93 mi (1,979.38 km) |
| Round Lake Beach to Spanish Lake (Missouri) | 272.01 mi (437.76 km) |
| Round Lake Beach to Spanish Springs (Nevada) | 1,647.87 mi (2,651.99 km) |
| Round Lake Beach to Sparks (Nevada) | 1,651.93 mi (2,658.52 km) |
| Round Lake Beach to Spartanburg (South Carolina) | 611.31 mi (983.81 km) |
| Round Lake Beach to Spearfish (South Dakota) | 801.48 mi (1,289.87 km) |
| Round Lake Beach to Speedway (Indiana) | 202.53 mi (325.93 km) |
| Round Lake Beach to Spencer (Iowa) | 362.54 mi (583.45 km) |
| Round Lake Beach to Spokane (Washington) | 1,469.61 mi (2,365.11 km) |
| Round Lake Beach to Spokane Valley (Washington) | 1,460.38 mi (2,350.25 km) |
