| BED | KBED | Laurence G. Hanscom Field | Bedford/Hanscom | |
| LSF | KLSF | Lawson Army Air Field - Ft Benning | Columbus | |
| LAW | KLAW | Lawton-Fort Sill Regional Airport | Lawton | |
| HOB | KHOB | Lea County Airport | Hobbs | |
| LEB | KLEB | Lebanon Municipal Airport | Lebanon | |
| AIZ | KAIZ | Lee C Fine Memorial Airport | Kaiser/Lake Ozark | |
| - | KLXT | Lee's Summit Municipal Airport | Lee's Summit | |
| - | KJYO | Leesburg Executive Airport | Leesburg | |
| LEE | KLEE | Leesburg International Airport | Leesburg | |
| SMN | KSMN | Lemhi County Airport | Salmon | |
| KLL | - | Levelock Airport | Levelock | |
| LOT | KLOT | Lewis University Airport | Romeoville | |
| LWS | KLWS | Lewiston-Nez Perce County Regional Airport | Lewiston | |
| LWT | KLWT | Lewistown Municipal Airport | Lewistown | |
| LNK | KLNK | Lincoln Airport | Lincoln | |
| LDJ | KLDJ | Linden Airport | Linden | |
| LVK | KLVK | Livermore Municipal Airport | Livermore | |
| - | KOZW | Livingston Co | Howell | |
| CXO | KCXO | Lone Star Executive Airport | Conroe | |
| LPS | - | Lopez Island Airport | Lopez Island | |
| LAM | KLAM | Los Alamos Airport | Los Alamos | |
| RBW | KRBW | Lowcountry Regional Airport | Walterboro | |
| LUF | KLUF | Luke Air Force Base | Phoenix | |
| LBT | KLBT | Lumberton Airport | Lumberton | |
| IPT | KIPT | Lycoming County Airport | Williamsport | |
| MCF | KMCF | MacDill Air Force Base | Tampa | |
| MCD | KMCD | Mackinac Island Airport | Mackinac Island | |
| - | - | Macon Co | Franklin | |
| MAE | KMAE | Madera Airport | Madera | |
| - | - | Madison Airport | Richmond | |
| TWF | KTWF | Magic Valley Regional Airport | Twin Falls | |
| GVT | KGVT | Majors Field | Greenville | |
| MMH | KMMH | Mammoth Lakes Airport | Mammoth Lakes | |
| MNZ | KHEF | Manassas Regional Airport | Manassas | |
| MHK | KMHK | Manhattan Municipal Airport | Manhattan | |
| MLY | PAML | Manley Hot Springs Airport | Manley Hot Springs | |
| KMO | PAMB | Manokotak Airport | Manokotak | |
| AVW | KAVQ | Marana Regional Airport | Tucson | |
| RIV | KRIV | March Air Reserve Base | Riverside | |
| MRK | KMKY | Marco Island Airport | Marco Island | |
| MRF | KMRF | Marfa Municipal Airport | Marfa | |
| NOT | KDVO | Marin County Airport | Novato | |
| - | KNKT | Marine Corps Air Station Cherry Point | Cherry Point | |
| NKX | KNKX | Marine Corps Air Station Miramar | San Diego | |
| RMY | - | Mariposa-Yosemite Airport | Mariposa | |
| MLL | PADM | Marshall Don Hunter Sr. Airport | Marshall | |
| MTN | KMTN | Martin State Airport | Baltimore | |
| MCW | KMCW | Mason City Airport | Mason City | |
| LDM | KLDM | Mason Co | Ludington | |
| MHR | KMHR | Mather Airport | Sacramento | |