| Rhondda to Lowell (Indiana) | 3,836.54 mi (6,174.32 km) |
| Rhondda to Lowell (Massachusetts) | 3,133.28 mi (5,042.53 km) |
| Rhondda to Lower Burrell (Pennsylvania) | 3,562.69 mi (5,733.60 km) |
| Rhondda to Lowes Island (Virginia) | 3,534.29 mi (5,687.89 km) |
| Rhondda to Lubbock (Texas) | 4,772.46 mi (7,680.54 km) |
| Rhondda to Lufkin (Texas) | 4,609.33 mi (7,418.00 km) |
| Rhondda to Luling (Louisiana) | 4,504.50 mi (7,249.29 km) |
| Rhondda to Lumberton (North Carolina) | 3,805.26 mi (6,123.97 km) |
| Rhondda to Lumberton (Texas) | 4,642.82 mi (7,471.89 km) |
| Rhondda to Lutz (Florida) | 4,263.95 mi (6,862.17 km) |
| Rhondda to Lynbrook (New York) | 3,312.68 mi (5,331.24 km) |
| Rhondda to Lynchburg (Virginia) | 3,684.13 mi (5,929.03 km) |
| Rhondda to Lynden (Washington) | 4,618.54 mi (7,432.82 km) |
| Rhondda to Lyndhurst (Ohio) | 3,592.90 mi (5,782.21 km) |
| Rhondda to Lyndon (Kentucky) | 3,904.20 mi (6,283.20 km) |
