| Round Lake Beach to Kennewick (Washington) | 1,549.99 mi (2,494.47 km) |
| Round Lake Beach to Kenosha (Wisconsin) | 17.70 mi (28.48 km) |
| Round Lake Beach to Kent (Ohio) | 356.50 mi (573.73 km) |
| Round Lake Beach to Kent (Washington) | 1,692.08 mi (2,723.14 km) |
| Round Lake Beach to Kentwood (Michigan) | 131.24 mi (211.20 km) |
| Round Lake Beach to Kerman (California) | 1,737.04 mi (2,795.50 km) |
| Round Lake Beach to Kernersville (North Carolina) | 608.51 mi (979.29 km) |
| Round Lake Beach to Kerrville (Texas) | 1,049.84 mi (1,689.55 km) |
| Round Lake Beach to Kettering (Maryland) | 638.67 mi (1,027.84 km) |
| Round Lake Beach to Kettering (Ohio) | 276.28 mi (444.63 km) |
| Round Lake Beach to Kewanee (Illinois) | 123.39 mi (198.58 km) |
| Round Lake Beach to Key Biscayne (Florida) | 1,237.49 mi (1,991.55 km) |
| Round Lake Beach to Key Largo (Florida) | 1,269.72 mi (2,043.42 km) |
| Round Lake Beach to Key West (Florida) | 1,282.41 mi (2,063.84 km) |
| Round Lake Beach to Keystone (Florida) | 1,031.26 mi (1,659.65 km) |
