| Llantrisant to Lowell (Indiana) | 3,840.36 mi (6,180.45 km) |
| Llantrisant to Lowell (Massachusetts) | 3,136.50 mi (5,047.70 km) |
| Llantrisant to Lower Burrell (Pennsylvania) | 3,566.13 mi (5,739.13 km) |
| Llantrisant to Lowes Island (Virginia) | 3,537.50 mi (5,693.06 km) |
| Llantrisant to Lubbock (Texas) | 4,776.48 mi (7,687.00 km) |
| Llantrisant to Lufkin (Texas) | 4,612.91 mi (7,423.76 km) |
| Llantrisant to Luling (Louisiana) | 4,507.78 mi (7,254.57 km) |
| Llantrisant to Lumberton (North Carolina) | 3,808.23 mi (6,128.76 km) |
| Llantrisant to Lumberton (Texas) | 4,646.31 mi (7,477.52 km) |
| Llantrisant to Lutz (Florida) | 4,266.68 mi (6,866.57 km) |
| Llantrisant to Lynbrook (New York) | 3,315.84 mi (5,336.33 km) |
| Llantrisant to Lynchburg (Virginia) | 3,687.31 mi (5,934.15 km) |
| Llantrisant to Lynden (Washington) | 4,623.67 mi (7,441.07 km) |
| Llantrisant to Lyndhurst (Ohio) | 3,596.48 mi (5,787.98 km) |
| Llantrisant to Lyndon (Kentucky) | 3,907.74 mi (6,288.91 km) |
