| Round Lake Beach to Kalispell (Montana) | 1,330.28 mi (2,140.88 km) |
| Round Lake Beach to Kaneohe (Hawaii) | 4,216.07 mi (6,785.11 km) |
| Round Lake Beach to Kankakee (Illinois) | 88.94 mi (143.14 km) |
| Round Lake Beach to Kannapolis (North Carolina) | 621.88 mi (1,000.82 km) |
| Round Lake Beach to Kansas City (Kansas) | 414.81 mi (667.58 km) |
| Round Lake Beach to Kansas City (Missouri) | 406.48 mi (654.17 km) |
| Round Lake Beach to Kapaa (Hawaii) | 4,266.74 mi (6,866.66 km) |
| Round Lake Beach to Kapolei (Hawaii) | 4,233.00 mi (6,812.35 km) |
| Round Lake Beach to Katy (Texas) | 970.53 mi (1,561.92 km) |
| Round Lake Beach to Kaukauna (Wisconsin) | 131.47 mi (211.59 km) |
| Round Lake Beach to Kaysville (Utah) | 1,230.51 mi (1,980.31 km) |
| Round Lake Beach to Kearney (Missouri) | 388.79 mi (625.70 km) |
| Round Lake Beach to Kearney (Nebraska) | 580.23 mi (933.80 km) |
| Round Lake Beach to Kearns (Utah) | 1,239.56 mi (1,994.88 km) |
| Round Lake Beach to Kearny (New Jersey) | 729.55 mi (1,174.09 km) |
