| Abdul Rachman Saleh Airport | MLG | Malang | ID |
| Aden Adde International Airport | MGQ | Mogadishu | SO |
| Adolfo Suárez Madrid–Barajas Airport | MAD | Madrid | ES |
| Aerotortuguero Airport | — | Roxana | CR |
| Agricola La Tuxcana Airport | — | Tuxcacuesco | MX |
| Amasya Merzifon Airport | MZH | Amasya | TR |
| Amborovy Airport | MJN | Mahajanga | MG |
| Ástor Piazzola International Airport | MDQ | Mar del Plata | AR |
| Augusto C. Sandino (Managua) International Airport | MGA | Managua | NI |
| Camaguey-Campo Cuatro Milpas Airport | — | Guasave | MX |
| Carrasco General Cesáreo L. Berisso International Airport | MVD | Ciudad de la Costa | UY |
| Cedros Airport | — | Mazapil | MX |
| Chennai International Airport | MAA | Chennai | IN |
| Chicago Midway International Airport | MDW | Chicago | US |
| Cut Nyak Dhien Airport | MEQ | Kuala Pesisir | ID |
| Dane County Regional Truax Field | MSN | Madison | US |
| Dix-Sept Rosado Airport | MVF | Mossoró | BR |
| Eduardo Gomes International Airport | MAO | Manaus | BR |
| Eloy Alfaro International Airport | MEC | Manta | EC |
| Emperor Nicholas II Murmansk Airport | MMK | Murmansk | RU |
| Eugenio Maria De Hostos Airport | MAZ | Mayaguez | PR |
| Fabio Alberto Leon Bentley Airport | MVP | Mitú | CO |
| Frank Miloye Milenkowichi–Marília State Airport | MII | Marília | BR |
| Frans Xavier Seda Airport | MOF | Waioti | ID |
| General Francisco J. Mujica International Airport | MLM | Morelia | MX |
| General Mitchell International Airport | MKE | Milwaukee | US |
| General Rafael Buelna International Airport | MZT | Mazatlàn | MX |
| General Rodolfo Sánchez Taboada International Airport | MXL | Mexicali | MX |
| General Servando Canales International Airport | MAM | Matamoros | MX |
| Godofredo P. Ramos Airport | MPH | Caticlan | PH |
| Governor Francisco Gabrielli International Airport | MDZ | Mendoza | AR |
| Harrisburg International Airport | MDT | Harrisburg | US |
| Isla Cedros Airport | — | Cedros Island | MX |
| João Correa da Rocha Airport | MAB | Marabá | BR |
| John A. Osborne Airport | MNI | Gerald's Park | MS |
| Jose Maria Córdova International Airport | MDE | Medellín | CO |
| José Tadeo Monagas International Airport | MUN | Maturín | VE |
| Kansas City International Airport | MCI | Kansas City | US |
| Katima Mulilo Airport | MPA | Mpacha | NA |
| Key Field / Meridian Regional Airport | MEI | Meridian | US |
| Kruger Mpumalanga International Airport | MQP | Mbombela | ZA |
| La Chinita International Airport | MAR | Maracaibo | VE |
| La Nubia Airport | MZL | Manizales | CO |
| Leonard M. Thompson International Airport | MHH | Marsh Harbour | BS |
| Los Garzones Airport | MTR | Montería | CO |
| Louis Armstrong New Orleans International Airport | MSY | New Orleans | US |
| M'Vengue El Hadj Omar Bongo Ondimba International Airport | MVB | Franceville | GA |
| Maastricht Aachen Airport | MST | Maastricht | NL |
| Macapá - Alberto Alcolumbre International Airport | MCP | Macapá | BR |
| Macau International Airport | MFM | Nossa Senhora do Carmo | MO |
| Mackay Airport | MKY | Mackay | AU |
| Madang Airport | MAG | Madang | PG |
| Mae Sot Airport | MAQ | — | TH |
| Mafia Airport | MFA | Kilindoni | TZ |
| Magnitogorsk International Airport | MQF | Magnitogorsk | RU |
| Magway Airport | MWQ | Magway | MM |
| Mahshahr Airport | MRX | Mahshahr | IR |
| Maiduguri International Airport | MIU | Maiduguri | NG |
| Maio Airport | MMO | Vila do Maio | CV |
| Majkin Airport | MJE | Majkin | MH |
| Makemo Airport | MKP | Makemo | PF |
| Makhachkala Uytash International Airport | MCX | Makhachkala | RU |
| Makokou Airport | MKU | Makokou | GA |
| Makurdi Airport | MDI | Makurdi | NG |
| Malacca International Airport | MKZ | Malacca | MY |
| Malakal International Airport | MAK | Malakal | SS |
| Malanje Airport | MEG | Malanje | AO |
| Malatya Erhaç Airport | MLX | Malatya | TR |
| Maleo Airport | MOH | Morowali | ID |
| Malindi International Airport | MYD | Malindi | KE |
| Malmö Sturup Airport | MMX | Malmö | SE |
| Malta International Airport | MLA | Valletta | MT |
| Mammoth Yosemite Airport | MMH | Mammoth Lakes | US |
| Mana Island Airport | MNF | Mana Island | FJ |
| Mananjary Airport | MNJ | Mananjary | MG |
| Manaoba Airport | MHM | Manaoba | SB |
| Manchester Airport | MAN | Manchester, Greater Manchester | GB |
| Manchester-Boston Regional Airport | MHT | Manchester | US |
| Mandalay International Airport | MDL | Mandalay | MM |
| Mandalgobi Airport | MXW | Mandalgobi | MN |
| Manhattan Regional Airport | MHK | Manhattan | US |
| Manicoré Airport | MNX | Manicoré | BR |
| Manihiki Island Airport | MHX | Manihiki Island | CK |
| Maningrida Airport | MNG | Maningrida | AU |
| Manistee County Blacker Airport | MBL | Manistee | US |
| Manley Hot Springs Airport | MLY | Manley Hot Springs | US |
| Mannheim-City Airport | MHG | Mannheim | DE |
| Manuel Crescencio Rejón International Airport | MID | Mérida | MX |
| Maputo Airport | MPM | Maputo | MZ |
| Mara Serena Lodge Airstrip | MRE | Serena | KE |
| Mardin Airport | MQM | Mardin | TR |
| Maré Airport | MEE | Maré | NC |
| Margate Airport | MGH | Margate | ZA |
| Maribor Edvard Rusjan Airport | MBX | Maribor | SI |
| Mariehamn Airport | MHQ | Mariehamn | FI |
| Mário Ribeiro Airport | MOC | Montes Claros | BR |
| Maripasoula Airport | MPY | Maripasoula | GF |
| Mariupol International Airport | MPW | Mariupol | UA |
| Marquette/Sawyer International Airport | MQT | Gwinn | US |
| Marseille Provence Airport | MRS | Marignane, Bouches-du-Rhône | FR |
| Marshall Don Hunter Sr Airport | MLL | Marshall | US |
| Marshall Islands International Airport | MAJ | Majuro Atoll | MH |
| Martha's Vineyard Airport | MVY | Martha's Vineyard | US |
| Marudi Airport | MUR | Marudi | MY |
| Mary International Airport | MYP | Mary | TM |
| Mashhad International Airport | MHD | Mashhad | IR |
| Mason City Municipal Airport | MCW | Mason City | US |
| Massena International Airport Richards Field | MSS | Massena | US |
| Mataiva Airport | MVT | — | PF |
| Matsu Beigan Airport | MFK | Matsu (Beigan) | TW |
| Matsuyama Airport | MYJ | Matsuyama | JP |
| Mauke Airport | MUK | Mauke Island | CK |
| Maun International Airport | MUB | Maun | BW |
| Maupiti Airport | MAU | — | PF |
| Mawlamyine Airport | MNU | Mawlamyine | MM |
| May Creek Airport | MYK | May Creek | US |
| Mayaguana Airport | MYG | Abraham Bay Settlement | BS |
| Maymana Zahiraddin Faryabi Airport | MMZ | Maymana | AF |
| Mazar-i-Sharif International Airport | MZR | Mazar-i-Sharif | AF |
| Mbandaka Airport | MDK | Mbandaka | CD |
| MBS International Airport | MBS | Freeland | US |
| Mbuji Mayi Airport | MJM | Mbuji Mayi | CD |
| McAllen Miller International Airport | MFE | McAllen | US |
| McArthur River Mine Airport | MCV | McArthur River Mine | AU |
| McCall Municipal Airport | MYL | McCall | US |
| McCook Ben Nelson Regional Airport | MCK | McCook | US |
| McGrath Airport | MCG | McGrath | US |
| McKellar-Sipes Regional Airport | MKL | Jackson | US |
| Meekatharra Airport | MKR | — | AU |
| Mehamn Airport | MEH | Mehamn | NO |
| Meizhou Meixian Changgangji International Airport | MXZ | Meizhou (Meixian) | CN |
| Mekele Alula Aba Nega Airport | MQX | Mekele | ET |
| Mekoryuk Airport | MYU | Mekoryuk | US |
| Melbourne Airport | MEL | Melbourne | AU |
| Melbourne Essendon Airport | MEB | Essendon Fields | AU |
| Melbourne Moorabbin Airport | MBW | Melbourne | AU |
| Melbourne Orlando International Airport | MLB | Melbourne | US |
| Melilla Airport | MLN | Melilla | ES |
| Memanbetsu Airport | MMB | Ōzora | JP |
| Memphis International Airport | MEM | Memphis | US |
| Mendi Airport | MDU | Mendi | PG |
| Menorca Airport | MAH | Mahón (Maó) | ES |
| Merced Regional Macready Field | MCE | Merced | US |
| Merimbula Airport | MIM | Merimbula | AU |
| Merrill Field | MRI | Anchorage | US |
| Mersa Matruh International Airport | MUH | Marsa Matruh | EG |
| Mexico City Benito Juárez International Airport | MEX | Mexico City | MX |
| Mfuwe International Airport | MFU | Mfuwe | ZM |
| Miami International Airport | MIA | Miami | US |
| Mianyang Nanjiao Airport | MIG | Mianyang (Fucheng) | CN |
| Michigan City Municipal Airport | MGC | Michigan City | US |
| Middle Georgia Regional Airport | MCN | Macon | US |
| Midland International Air and Space Port | MAF | Midland | US |
| Milan Malpensa International Airport | MXP | Ferno (VA) | IT |
| Mildura Airport | MQL | Mildura | AU |
| Mili Island Airport | MIJ | Mili Island | MH |
| Milingimbi Airport | MGT | Milingimbi Island | AU |
| Milos Airport | MLO | Milos Island | GR |
| Minamidaito Airport | MMD | Minamidaito | JP |
| Minatitlán/Coatzacoalcos International Airport | MTT | Cosoleacaque | MX |
| Mineral Wells Regional Airport | MWL | Mineral Wells | US |
| Mineralnye Vody Airport | MRV | Mineralnyye Vody | RU |
| Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | MSP | Minneapolis | US |
| Minot International Airport | MOT | Minot | US |
| Minsk National Airport | MSQ | Minsk | BY |
| Minto Al Wright Airport | MNT | Minto | US |
| Miquelon Airport | MQC | Miquelon | PM |
| Miri Airport | MYY | Miri | MY |
| Mirny Airport | MJZ | Mirny | RU |
| Misawa Airport / Misawa Air Base | MSJ | Misawa | JP |
| Misima Island Airport | MIS | Misima Island | PG |
| Misrata International Airport | MRA | Misrata | LY |
| Missoula Montana Airport | MSO | Missoula | US |
| Mitiaro Island Airport | MOI | Mitiaro Island | CK |
| Mitiga International Airport | MJI | Tripoli | LY |
| Miyakejima Airport | MYE | Miyakejima | JP |
| Miyako Airport | MMY | Miyakojima | JP |
| Mizan Teferi Airport | MTF | Mizan Teferi | ET |
| Mkuze Airport | MZQ | Mkuze | ZA |
| Mmabatho International Airport | MBD | Mafeking | ZA |
| Mo i Rana Airport, Røssvoll | MQN | Mo i Rana | NO |
| Moala Airport | MFJ | Moala | FJ |
| Mobile Regional Airport | MOB | Mobile | US |
| Mocopulli Airport | MHC | Dalcahue | CL |
| Moengo Airstrip | MOJ | Moengo | SR |
| Mogilev Airport | MVQ | Mogilev | BY |
| Moi International Airport | MBA | Mombasa | KE |
| Moises R. Espinosa Airport | MBT | Masbate | PH |
| Molde Airport, Årø | MOL | Årø | NO |
| Molokai Airport | MKK | Kaunakakai | US |
| Moma Airport | MQJ | Khonuu | RU |
| Momote Airport | MAS | Manus Island | PG |
| Monastir Habib Bourguiba International Airport | MIR | Monastir | TN |
| Monbetsu Airport | MBE | Monbetsu | JP |
| Mong Hsat Airport | MOG | Mong Hsat | MM |
| Mono Airport | MNY | Stirling Island | SB |
| Monroe Regional Airport | MLU | Monroe | US |
| Montauk Airport | MTP | Montauk | US |
| Monterey Regional Airport | MRY | Monterey | US |
| Monterrey International Airport | MTY | Monterrey | MX |
| Montgomery Regional (Dannelly Field) Airport | MGM | Montgomery | US |
| Montpellier-Méditerranée Airport | MPL | Montpellier/Méditerranée | FR |
| Montrose Regional Airport | MTJ | Montrose | US |
| Moorea Temae Airport | MOZ | Moorea-Maiao | PF |
| Mopah International Airport | MKQ | Merauke | ID |
| Mopti Airport | MZI | Sévaré | ML |
| Mora Airport | MXX | Mora | SE |
| Moradabad Airport | MZS | Moradabad | IN |
| Moranbah Airport | MOV | Moranbah | AU |
| Moree Airport | MRZ | Moree | AU |
| Morgantown Municipal Airport Walter L. (Bill) Hart Field | MGW | Morgantown | US |
| Moro Airport | MXH | Moro | PG |
| Mörön Airport | MXV | Mörön | MN |
| Morondava Airport | MOQ | Morondava | MG |
| Moruya Airport | MYA | Moruya | AU |
| Moshoeshoe I International Airport | MSU | Maseru(Mazenod) | LS |
| Mosjøen Airport, Kjærstad | MJF | Mosjøen | NO |
| Motygino Airport | MJY | Motygino | RU |
| Mount Gambier Airport | MGB | Mount Gambier | AU |
| Mount Hotham Airport | MHU | Mount Hotham | AU |
| Mount Magnet Airport | MMG | — | AU |
| Mount Pleasant Airport / RAF Mount Pleasant | MPN | Mount Pleasant | FK |
| Mountain Village Airport | MOU | Mountain Village | US |
| Mtwara Airport | MYW | Mtwara | TZ |
| Muan International Airport | MWX | Muan (Piseo-ri) | KR |
| Mudanjiang Hailang International Airport | MDG | Mudanjiang | CN |
| Mukah Airport | MKM | Mukah | MY |
| Muko Muko Airport | MPC | Muko Muko | ID |
| Multan International Airport | MUX | Multan | PK |
| Mulu Airport | MZV | Mulu | MY |
| Munda Airport | MUA | Munda | SB |
| Munich Airport | MUC | Munich | DE |
| Murray Island Airport | MYI | Murray Island | AU |
| Muş Airport | MSR | Muş | TR |
| Muscat International Airport | MCT | Muscat/Seeb | OM |
| Muskegon County Airport | MKG | Muskegon | US |
| Muskrat Dam Airport | MSA | Muskrat Dam | CA |
| Musoma Airport | MUZ | Musoma | TZ |
| Mustique Airport | MQS | Lovell | VC |
| Muzaffarabad Airport | MFG | Muzaffarabad | PK |
| Mwanza International Airport | MWZ | Mwanza | TZ |
| Myeik Airport | MGZ | Mkeik | MM |
| Myitkyina Airport | MYT | Myitkyina | MM |
| Myrtle Beach International Airport | MYR | Myrtle Beach | US |
| Mysore Airport | MYQ | Mysore | IN |
| Mytilene International Airport | MJT | Mytilene | GR |
| Nacala International Airport | MNC | Nacala | MZ |
| Ninoy Aquino International Airport | MNL | Manila (Pasay) | PH |
| Northwest Alabama Regional Airport | MSL | Muscle Shoals | US |
| Omtepe Airport | — | Omtepe Island | NI |
| Orlando International Airport | MCO | Orlando | US |
| Penghu Magong Airport | MZG | Huxi | TW |
| Prince Mohammad Bin Abdulaziz Airport | MED | Medina | SA |
| Quad City International Airport | MLI | Moline | US |
| Regional de Maringá - Sílvio Name Júnior Airport | MGF | Maringá | BR |
| Rendani Airport | MKW | Manokwari | ID |
| Rogue Valley International-Medford Airport | MFR | Medford | US |
| Salak Airport | MVR | Maroua | CM |
| Sam Ratulangi International Airport | MDC | Manado | ID |
| Sangster International Airport | MBJ | Montego Bay | JM |
| Shark Bay Airport | MJK | Denham | AU |
| Shinshu-Matsumoto Airport | MMJ | Matsumoto | JP |
| Sierra Maestra International Airport | MZO | Manzanillo | CU |
| Sir Seewoosagur Ramgoolam International Airport | MRU | Plaine Magnien | MU |
| Songwe Airport | MBI | Mbeya | TZ |
| Spriggs Payne Airport | MLW | Monrovia | LR |
| Sunshine Coast Airport | MCY | Maroochydore | AU |
| Teesside International Airport | MME | Darlington, Durham | GB |
| Velana International Airport | MLE | Malé | MV |
| Veterans Airport of Southern Illinois | MWA | Marion | US |
| Waimea Kohala Airport | MUE | Waimea (Kamuela) | US |
| Welwitschia Mirabilis International Airport | MSZ | Moçâmedes | AO |
| Zumbi dos Palmares International Airport | MCZ | Maceió | BR |