| Keystone to Lowell (Indiana) | 949.18 mi (1,527.56 km) |
| Keystone to Lowell (Massachusetts) | 1,184.28 mi (1,905.91 km) |
| Keystone to Lower Burrell (Pennsylvania) | 875.71 mi (1,409.32 km) |
| Keystone to Lowes Island (Virginia) | 812.03 mi (1,306.84 km) |
| Keystone to Lubbock (Texas) | 1,201.97 mi (1,934.38 km) |
| Keystone to Lufkin (Texas) | 759.84 mi (1,222.84 km) |
| Keystone to Luling (Louisiana) | 483.99 mi (778.90 km) |
| Keystone to Lumberton (North Carolina) | 496.20 mi (798.56 km) |
| Keystone to Lumberton (Texas) | 714.98 mi (1,150.64 km) |
| Keystone to Lutz (Florida) | 9.35 mi (15.05 km) |
| Keystone to Lynbrook (New York) | 1,002.71 mi (1,613.70 km) |
| Keystone to Lynchburg (Virginia) | 670.21 mi (1,078.61 km) |
| Keystone to Lynden (Washington) | 2,546.42 mi (4,098.06 km) |
| Keystone to Lyndhurst (Ohio) | 926.99 mi (1,491.85 km) |
| Keystone to Lyndon (Kentucky) | 721.03 mi (1,160.39 km) |
