| - | - | Marion Municipal | Marion | |
| MNN | KMNN | Marion Municipal Airport | Marion | |
| - | - | Marion-Crittenden Co | Marion | |
| - | - | Marked Tree Municipal | Marked Tree | |
| JMD | - | Market Centre Heliport | Dallas | |
| - | KMKV | Marksville Municipal | Marksville | |
| - | - | Marlboro | Matawan | |
| MXG | - | Marlborough Airport | Marlborough | |
| - | - | Marlette | Marlette | |
| - | - | Marlin | Marlin | |
| JMA | - | Marriot Astrodome Heliport | Houston | |
| FRI | KFRI | Marshall Army Air Field | Fort Riley | |
| - | - | Marshall Co | Moundsville | |
| - | - | Marshall Co | Lacon | |
| - | - | Marshall Co | Holly Springs | |
| MIW | KMIW | Marshalltown Municipal Airport | Marshalltown | |
| - | - | Marshfield | Marshfield | |
| MFI | KMFI | Marshfield Municipal Airport | Marshfield | |
| - | - | Martha Lake | Alderwood Manor | |
| - | - | Martin | South Sioux City | |
| - | - | Martin | College Place | |
| - | KMCZ | Martin Co | Williamston | |
| CNU | KCNU | Martin Johnson Airport | Chanute | |
| - | - | Martin Municipal | Martin | |
| MDA | KMDA | Martindale Army Air Field | San Antonio | |
| - | - | Maryland | Indian Head | |
| - | KMYZ | Marysville Municipal | Marysville | |
| - | KEVU | Maryville Memorial | Maryville | |
| - | - | Mason Co | Point Pleasant | |
| - | - | Mason Co | Mason | |
| - | KTEW | Mason Jewett | Mason | |
| - | - | Massey Ranch | New Smyrna Beach | |
| MGI | - | Matagorda Island National Wildlife Refuge Airport | Matagorda Island | |
| - | - | Mathews Memorial | Tipton | |
| - | - | Mathis | Cumming | |
| - | - | Mattituck | Mattituck | |
| MRC | KMRC | Maury County Airport | Columbia | |
| - | - | Mauston-New Lisbon Union | New Lisbon | |
| EGP | - | Maverick County Airport | Eagle Pass | |
| OUN | KOUN | Max Westheimer Airport | Norman | |
| - | - | Maxson Airfield | Alexandria Bay | |
| MXE | KMEB | Maxton Airport | Maxton | |
| MXF | KMXF | Maxwell Air Force Base | Montgomery | |
| - | - | May | May | |
| - | - | May | Houston | |
| MYK | - | May Creek Airport | May Creek | |
| - | - | Mayes | Carson City | |
| - | - | Mayfield Airport | Akron | |
| - | - | Mayfield-Graves Co | Mayfield | |
| NRB | KNRB | Mayport Naval Station | Mayport | |