| Round Lake Beach to Smyrna (Delaware) | 685.21 mi (1,102.75 km) |
| Round Lake Beach to Smyrna (Georgia) | 619.30 mi (996.66 km) |
| Round Lake Beach to Smyrna (Tennessee) | 450.65 mi (725.25 km) |
| Round Lake Beach to Snellville (Georgia) | 628.99 mi (1,012.26 km) |
| Round Lake Beach to Snoqualmie (Washington) | 1,674.62 mi (2,695.05 km) |
| Round Lake Beach to Snyder (Texas) | 967.48 mi (1,557.01 km) |
| Round Lake Beach to Socastee (South Carolina) | 776.49 mi (1,249.63 km) |
| Round Lake Beach to Socorro (Texas) | 1,243.26 mi (2,000.84 km) |
| Round Lake Beach to Soddy-Daisy (Tennessee) | 516.28 mi (830.87 km) |
| Round Lake Beach to Solana Beach (California) | 1,711.35 mi (2,754.14 km) |
| Round Lake Beach to Soledad (California) | 1,809.99 mi (2,912.90 km) |
| Round Lake Beach to Solon (Ohio) | 348.34 mi (560.60 km) |
| Round Lake Beach to Somers Point (New Jersey) | 734.42 mi (1,181.94 km) |
| Round Lake Beach to Somerset (Kentucky) | 409.64 mi (659.25 km) |
| Round Lake Beach to Somerset (New Jersey) | 714.32 mi (1,149.58 km) |
