| Round Lake Beach to Lombard (Illinois) | 35.05 mi (56.41 km) |
| Round Lake Beach to Lomita (California) | 1,736.97 mi (2,795.39 km) |
| Round Lake Beach to Lompoc (California) | 1,817.82 mi (2,925.50 km) |
| Round Lake Beach to London (Ohio) | 296.38 mi (476.98 km) |
| Round Lake Beach to Lone Tree (Colorado) | 896.33 mi (1,442.50 km) |
| Round Lake Beach to Long Beach (California) | 1,729.26 mi (2,782.98 km) |
| Round Lake Beach to Long Beach (Mississippi) | 832.55 mi (1,339.86 km) |
| Round Lake Beach to Long Beach (New York) | 755.37 mi (1,215.64 km) |
| Round Lake Beach to Long Branch (New Jersey) | 744.04 mi (1,197.41 km) |
| Round Lake Beach to Longmont (Colorado) | 895.31 mi (1,440.86 km) |
| Round Lake Beach to Longview (Texas) | 772.93 mi (1,243.92 km) |
| Round Lake Beach to Longview (Washington) | 1,731.26 mi (2,786.20 km) |
| Round Lake Beach to Longwood (Florida) | 1,017.14 mi (1,636.93 km) |
| Round Lake Beach to Lorain (Ohio) | 310.00 mi (498.90 km) |
| Round Lake Beach to Lorton (Virginia) | 623.99 mi (1,004.22 km) |
