| Pontypridd to Lowell (Indiana) | 3,839.88 mi (6,179.70 km) |
| Pontypridd to Lowell (Massachusetts) | 3,136.66 mi (5,047.97 km) |
| Pontypridd to Lower Burrell (Pennsylvania) | 3,566.07 mi (5,739.03 km) |
| Pontypridd to Lowes Island (Virginia) | 3,537.67 mi (5,693.32 km) |
| Pontypridd to Lubbock (Texas) | 4,775.77 mi (7,685.86 km) |
| Pontypridd to Lufkin (Texas) | 4,612.70 mi (7,423.42 km) |
| Pontypridd to Luling (Louisiana) | 4,507.88 mi (7,254.73 km) |
| Pontypridd to Lumberton (North Carolina) | 3,808.63 mi (6,129.40 km) |
| Pontypridd to Lumberton (Texas) | 4,646.19 mi (7,477.32 km) |
| Pontypridd to Lutz (Florida) | 4,267.31 mi (6,867.58 km) |
| Pontypridd to Lynbrook (New York) | 3,316.06 mi (5,336.68 km) |
| Pontypridd to Lynchburg (Virginia) | 3,687.51 mi (5,934.47 km) |
| Pontypridd to Lynden (Washington) | 4,621.31 mi (7,437.28 km) |
| Pontypridd to Lyndhurst (Ohio) | 3,596.27 mi (5,787.63 km) |
| Pontypridd to Lyndon (Kentucky) | 3,907.57 mi (6,288.62 km) |
