| Port Code | Port Name | Country |
| USLDG | Landenberg | United States |
| USLDH | Lindenhurst | United States |
| USLDI | Lodi | United States |
| USLDJ | Linden | United States |
| USLDL | Lindale | United States |
| USLDM | Ludington | United States |
| USLDN | London | United States |
| USLDO | Langdon | United States |
| USLDR | Landover | United States |
| USLDS | Leeds | United States |
| USLDT | Lyndhurst | United States |
| USLDU | Landrum | United States |
| USLDV | Landisville | United States |
| USLDW | Lansdowne | United States |
| USLDX | Ladonia | United States |
| USLDY | Ledyard Center | United States |
| USLDZ | Ladson | United States |
| USLEA | Leander | United States |
| USLEB | White River-Hanover-Lebanon Apt | United States |
| USLEB | Lebanon-White River-Hanover Apt | United States |
| USLEB | Hanover-Lebanon-White River Apt | United States |
| USLEC | Leechburg | United States |
| USLED | Leeds | United States |
| USLEE | Leesburg | United States |
| USLEF | Lehigh Acres | United States |
| USLEG | Lehigh | United States |
| USLEH | Lee | United States |
| USLEI | Lehi | United States |
| USLEJ | Leland | United States |
| USLEK | Lake Park | United States |
| USLEL | Lexington | United States |
| USLEM | Lemmon | United States |
| USLEN | Lena | United States |
| USLEO | Levittown | United States |
| USLEP | Leesport | United States |
| USLEQ | Lewis Center | United States |
| USLER | Lenoir | United States |
| USLES | Leesburg | United States |
| USLET | Lexington | United States |
| USLEW | Lewiston-Auburn Apt | United States |
| USLEW | Auburn-Lewiston Apt | United States |
| USLEX | Lexington | United States |
| USLEZ | Lester | United States |
| USLFA | Lebanon | United States |
| USLFC | Lake Forest | United States |
| USLFD | Landis | United States |
| USLFF | Bluffdale | United States |
| USLFG | Lafayette | United States |
| USLFJ | Little Falls | United States |
| USLFK | Lufkin | United States |
| USLFL | La Belle | United States |
| USLFN | Louisburg | United States |
| USLFO | La Follette | United States |
| USLFP | Laflin | United States |
| USLFQ | Lewisburg | United States |
| USLFR | Lake Forest | United States |
| USLFS | Little Falls | United States |
| USLFT | Lafayette | United States |
| USLFW | Lafayette | United States |
| USLFX | La Feria | United States |
| USLFY | Lafayette | United States |
| USLGA | La Guardia Apt/New York | United States |
| USLGB | Long Beach | United States |
| USLGC | La Grange | United States |
| USLGD | La Grande | United States |
| USLGE | Loganville | United States |
| USLGG | Long Grove | United States |
| USLGH | Laughlin | United States |
| USLGI | Ligonier | United States |
| USLGJ | Long Valley | United States |
| USLGL | Langley | United States |
| USLGN | Lagrange | United States |
| USLGO | Burlington | United States |
| USLGP | Logansport | United States |
| USLGR | La Grange | United States |
| USLGS | Livingston | United States |
| USLGT | Leighton | United States |
| USLGU | Logan | United States |
| USLGW | Longwood | United States |
| USLGX | La Grange | United States |
| USLGY | Langley | United States |
| USLHA | La Habra, Orange | United States |
| USLHB | Lost Harbor | United States |
| USLHF | Litchfield | United States |
| USLHH | Langeloth | United States |
| USLHI | Laguna Hills | United States |
| USLHK | Little Hocking | United States |
| USLHL | Leachville | United States |
| USLHM | Lake Hamilton | United States |
| USLHN | Lahaina | United States |
| USLHO | Lehigh Valley | United States |
| USLHS | Lithia Springs | United States |
| USLHV | Lock Haven | United States |
| USLIA | Lima | United States |
| USLIB | Liberty | United States |
| USLIC | Limon | United States |
| USLID | Lindale | United States |
| USLIE | Lindside | United States |
| USLIF | Littlefield | United States |
| USLIG | Ligonier | United States |