| Irthlingborough to Lomita (California) | 5,404.77 mi (8,698.13 km) |
| Irthlingborough to Lompoc (California) | 5,421.83 mi (8,725.59 km) |
| Irthlingborough to London (Ohio) | 3,835.63 mi (6,172.86 km) |
| Irthlingborough to Lone Tree (Colorado) | 4,642.37 mi (7,471.17 km) |
| Irthlingborough to Long Beach (California) | 5,399.73 mi (8,690.03 km) |
| Irthlingborough to Long Beach (Mississippi) | 4,531.31 mi (7,292.44 km) |
| Irthlingborough to Long Beach (New York) | 3,415.92 mi (5,497.38 km) |
| Irthlingborough to Long Branch (New Jersey) | 3,441.99 mi (5,539.35 km) |
| Irthlingborough to Longmont (Colorado) | 4,616.46 mi (7,429.48 km) |
| Irthlingborough to Longview (Texas) | 4,640.10 mi (7,467.52 km) |
| Irthlingborough to Longview (Washington) | 4,827.49 mi (7,769.09 km) |
| Irthlingborough to Longwood (Florida) | 4,297.46 mi (6,916.09 km) |
| Irthlingborough to Lorain (Ohio) | 3,715.25 mi (5,979.11 km) |
| Irthlingborough to Lorton (Virginia) | 3,644.27 mi (5,864.89 km) |
| Irthlingborough to Los Alamitos (California) | 5,396.34 mi (8,684.57 km) |
