| - | - | Maverick County Memorial International Airport | Eagle Pass | |
| MBS | KMBS | MBS International Airport | Saginaw | |
| MCK | KMCK | Mc Cook Airport | McCook | |
| - | KMMV | Mc Minnville Municipal | Mc Minnville | |
| MLC | KMLC | McAlester Regional Airport | McAlester | |
| MFE | KMFE | McAllen International Airport | McAllen | |
| TCM | KTCM | McChord Field | Tacoma | |
| MCC | KMCC | McClellan Air Force Base | Sacramento | |
| CLD | KCRQ | McClellan-Palomar Airport | Carlsbad | |
| IAB | KIAB | McConnell Air Force Base | Wichita | |
| MCG | PAMC | McGrath Airport | McGrath | |
| WRI | KWRI | McGuire Air Force Base | Trenton | |
| MKL | KMKL | Mckellar-Sipes Regional Airport | Jackson | |
| - | KTKI | McKinney National Airport | McKinney | |
| SSI | KSSI | McKinnon St. Simons Island Airport | Brunswick | |
| SLE | KSLE | McNary Field | Salem | |
| BFL | KBFL | Meadows Field Airport | Bakersfield | |
| HOT | KHOT | Memorial Field | Hot Springs | |
| CSV | KCSV | Memorial-Whitson Field | Crossville | |
| MNM | KMNM | Menominee-Marinette Twin County Airport | Menominee | |
| MCE | KMCE | Merced Municipal Airport | Merced | |
| KIC | KKIC | Mesa Del Rey Airport | King City | |
| MTM | - | Metlakatla Sea Plane Base | Metlakatla | |
| WMK | - | Meyers Chuck Sea Plane Base | Meyers Chuck | |
| MPB | - | Miami Sea Plane Base | Miami | |
| LBL | KLBL | Mid-America Regional Airport | Liberal | |
| BLV | KBLV | MidAmerica St. Louis Airport / Scott AFB | Belleville | |
| MCN | KMCN | Middle Georgia Regional Airport | Macon | |
| - | - | Middleton Municipal Airport | Middleton | |
| MWO | KMWO | Middletown Regional Airport | Middletown | |
| MDD | KMDD | Midland Airpark | Midland | |
| MIQ | KMLE | Millard Airport | Omaha | |
| VTN | KVTN | Miller Field | Valentine | |
| MLT | KMLT | Millinocket Municipal Airport | Millinocket | |
| MIV | KMIV | Millville Municipal Airport | Millville | |
| MHM | PAMH | Minchumina Intermediate Airport | Minchumina | |
| MIB | KMIB | Minot Air Force Base | Minot | |
| MOT | KMOT | Minot International Airport | Minot | |
| MNT | - | Minto Airport | Minto | |
| MMN | - | Minute Man Airfield | Stow | |
| LVM | KLVM | Mission Field | Livingston | |
| MSO | KMSO | Missoula International Airport | Missoula | |
| MHE | KMHE | Mitchell Municipal Airport | Mitchell | |
| BFM | KBFM | Mobile Downtown Airport | Mobile | |
| MBG | KMBG | Mobridge Municipal Airport | Mobridge | |
| MOD | KMOD | Modesto Municipal Airport | Modesto | |
| NUQ | KNUQ | Moffett Federal Field | Mountain View | |
| MHV | KMHV | Mojave Air and Space Port | Mojave | |
| BLM | KBLM | Monmouth Executive Airport | Belmar | |
| BMG | KBMG | Monroe County Airport | Bloomington | |