| MOX | KMOX | Morris Municipal Airport | Morris | |
| - | - | Morrow Co | Mt Gilead | |
| - | KDDH | Morse State | Bennington | |
| - | - | Moses Lake Municipal | Moses Lake | |
| MOS | - | Moses Point Intermediate Airport | Moses Point | |
| - | - | Moton Municipal | Tuskegee | |
| - | - | Mott Municipal | Mott | |
| - | - | Moultonboro | Moultonboro | |
| - | - | Moundridge Municipal | Moundridge | |
| - | - | Moundville | Moundville | |
| MCL | PAIN | Mount Mckinley Airport | Mount McKinley | |
| - | - | Mount Olive Municipal Airport | Mt Olive | |
| MPS | KMSA | Mount Pleasant Airport | Mount Pleasant | |
| MPZ | KMPZ | Mount Pleasant Municipal Airport | Mount Pleasant | |
| MPO | KMPO | Mount Pocono Airport | Mount Pocono | |
| - | - | Mount Snow | West Dover | |
| MUU | KMUU | Mount Union Airport | Mount Union | |
| MWS | - | Mount Wilson Airport | Mount Wilson | |
| - | KMKJ | Mountain Empire | Marion-Wytheville | |
| - | - | Mountain Grove Memorial | Mountain Grove | |
| WMH | KBPK | Mountain Home Airport | Mountain Home | |
| - | - | Mountain Home Municipal | Mountain Home | |
| - | - | Mountain Lakes | Helena | |
| - | - | Mountain Meadow Airstrip | Burlington | |
| - | - | Mountain Valley | Tehachapi | |
| - | KMNF | Mountain View | Mountain View | |
| - | - | Mountain View Wilcox Memorial | Mountain View | |
| - | - | Mountainair Municipal | Mountainair | |
| - | KMWK | Mt Airy-Surry Co | Mt Airy | |
| - | KAJG | Mt Carmel Municipal | Mt Carmel | |
| - | - | Mt Hawley Aux | Peoria | |
| - | - | Mt Pleasant-Scottdale | Mt Pleasant | |
| - | - | Mt Sterling Municipal | Mt Sterling | |
| - | KIOB | Mt Sterling-Montgomery Co | Mount Sterling | |
| - | - | Mt Vernon Municipal | Mt Vernon | |
| MSD | - | Mt. Pleasant Airport | Mount Pleasant | |
| - | - | Mud Lake | Mud Lake | |
| - | - | Muhlenberg Co | Greenville | |
| MUI | KMUI | Muir Aaf | Ft Indiantown Gap | |
| - | - | Muleshoe Municipal | Muleshoe | |
| MHN | KMHN | Mullen Airport | Mullen | |
| - | - | Munday Mun | Munday | |
| - | - | Murdo Municipal | Murdo | |
| - | - | Murdock Municipal | Murdock | |
| - | KMBT | Murfreesboro Municipal Airport | Murfreesboro | |
| - | - | Murphy | Murphy | |
| - | - | Murphy Hot Springs | Three Creek | |
| MUT | KMUT | Muscatine Airport | Muscatine | |
| - | - | Mustang Beach | Port Aransas | |
| MUV | - | Mustin Airfield | Philadelphia | |