| Round Lake Beach to Keene (New Hampshire) | 801.59 mi (1,290.03 km) |
| Round Lake Beach to Keizer (Oregon) | 1,741.51 mi (2,802.68 km) |
| Round Lake Beach to Keller (Texas) | 821.19 mi (1,321.58 km) |
| Round Lake Beach to Kelso (Washington) | 1,727.93 mi (2,780.83 km) |
| Round Lake Beach to Kemp Mill (Maryland) | 622.86 mi (1,002.39 km) |
| Round Lake Beach to Ken Caryl (Colorado) | 907.69 mi (1,460.78 km) |
| Round Lake Beach to Kendale Lakes (Florida) | 1,231.43 mi (1,981.80 km) |
| Round Lake Beach to Kendall (Florida) | 1,234.99 mi (1,987.53 km) |
| Round Lake Beach to Kendall Park (New Jersey) | 712.88 mi (1,147.26 km) |
| Round Lake Beach to Kendall West (Florida) | 1,230.92 mi (1,980.97 km) |
| Round Lake Beach to Kenmore (New York) | 469.37 mi (755.38 km) |
| Round Lake Beach to Kenmore (Washington) | 1,693.55 mi (2,725.51 km) |
| Round Lake Beach to Kenner (Louisiana) | 863.03 mi (1,388.91 km) |
| Round Lake Beach to Kennesaw (Georgia) | 606.85 mi (976.64 km) |
| Round Lake Beach to Kennett (Missouri) | 436.95 mi (703.21 km) |
