| Irthlingborough to Lowell (Indiana) | 3,922.99 mi (6,313.44 km) |
| Irthlingborough to Lowell (Massachusetts) | 3,232.86 mi (5,202.79 km) |
| Irthlingborough to Lower Burrell (Pennsylvania) | 3,657.76 mi (5,886.60 km) |
| Irthlingborough to Lowes Island (Virginia) | 3,633.75 mi (5,847.95 km) |
| Irthlingborough to Lubbock (Texas) | 4,853.29 mi (7,810.61 km) |
| Irthlingborough to Lufkin (Texas) | 4,700.98 mi (7,565.49 km) |
| Irthlingborough to Luling (Louisiana) | 4,602.37 mi (7,406.80 km) |
| Irthlingborough to Lumberton (North Carolina) | 3,908.81 mi (6,290.62 km) |
| Irthlingborough to Lumberton (Texas) | 4,736.23 mi (7,622.23 km) |
| Irthlingborough to Lutz (Florida) | 4,371.28 mi (7,034.89 km) |
| Irthlingborough to Lynbrook (New York) | 3,413.19 mi (5,493.01 km) |
| Irthlingborough to Lynchburg (Virginia) | 3,784.09 mi (6,089.90 km) |
| Irthlingborough to Lynden (Washington) | 4,653.29 mi (7,488.75 km) |
| Irthlingborough to Lyndhurst (Ohio) | 3,684.88 mi (5,930.23 km) |
| Irthlingborough to Lyndon (Kentucky) | 3,996.80 mi (6,432.23 km) |
