| Round Lake Beach to Leland (North Carolina) | 783.91 mi (1,261.57 km) |
| Round Lake Beach to Lemay (Missouri) | 289.89 mi (466.54 km) |
| Round Lake Beach to Lemon Grove (California) | 1,709.55 mi (2,751.26 km) |
| Round Lake Beach to Lemon Hill (California) | 1,763.51 mi (2,838.10 km) |
| Round Lake Beach to Lemont (Illinois) | 49.28 mi (79.31 km) |
| Round Lake Beach to Lemoore (California) | 1,735.36 mi (2,792.79 km) |
| Round Lake Beach to Lenexa (Kansas) | 423.85 mi (682.12 km) |
| Round Lake Beach to Lennox (California) | 1,734.23 mi (2,790.98 km) |
| Round Lake Beach to Lenoir (North Carolina) | 568.16 mi (914.36 km) |
| Round Lake Beach to Leominster (Massachusetts) | 830.25 mi (1,336.16 km) |
| Round Lake Beach to Leon Valley (Texas) | 1,065.60 mi (1,714.92 km) |
| Round Lake Beach to Levelland (Texas) | 984.90 mi (1,585.05 km) |
| Round Lake Beach to Levittown (New York) | 760.95 mi (1,224.63 km) |
| Round Lake Beach to Levittown (Pennsylvania) | 703.20 mi (1,131.69 km) |
| Round Lake Beach to Lewisburg (Tennessee) | 483.67 mi (778.40 km) |
