| Lanai Airport | Lanai City | LNY · PHNY | 1 |
| Lancaster Airport | Lancaster | LNS · KLNS | 2 |
| Laramie Regional Airport | Laramie | LAR · KLAR | 2 |
| Laredo International Airport | Laredo | LRD · KLRD | 3 |
| Las Cruces International Airport | Las Cruces | LRU · KLRU | 3 |
| Laurence G Hanscom Field | Bedford | BED · KBED | 2 |
| Lawton Fort Sill Regional Airport | Lawton | LAW · KLAW | 1 |
| Lea County Regional Airport | Hobbs | HOB · KHOB | 3 |
| Lebanon Municipal Airport | Lebanon | LEB · KLEB | 2 |
| Lehigh Valley International Airport | Allentown/Bethlehem | ABE · KABE | 2 |
| Lemhi County Airport | Salmon | SMN · KSMN | 1 |
| Lewiston Nez Perce County Airport | Lewiston | LWS · KLWS | 2 |
| Liberal Mid-America Regional Airport | Liberal | LBL · KLBL | 2 |
| Lincoln Airport | Lincoln | LNK · KLNK | 3 |
| Long Island MacArthur Airport | Islip | ISP · KISP | 3 |
| Lubbock Preston Smith International Airport | Lubbock | LBB · KLBB | 3 |
| Lynchburg Regional Airport - Preston Glenn Field | Lynchburg | LYH · KLYH | 2 |
| Mammoth Yosemite Airport | Mammoth Lakes | MMH · KMMH | 1 |
| Manchester-Boston Regional Airport | Manchester | MHT · KMHT | 2 |
| Manhattan Regional Airport | Manhattan | MHK · KMHK | 2 |
| Marquette Sawyer Regional Airport | Gwinn | MQT · KSAW | 1 |
| Mason City Municipal Airport | Mason City | MCW · KMCW | 2 |
| Massena International Airport Richards Field | Massena | MSS · KMSS | 2 |
| MBS International Airport | Freeland | MBS · KMBS | 2 |
| McAllen Miller International Airport | McAllen | MFE · KMFE | 2 |
| McCall Municipal Airport | McCall | MYL · KMYL | 1 |
| McClellan-Palomar Airport | Carlsbad | CLD · KCRQ | 1 |
| McCook Ben Nelson Regional Airport | McCook | MCK · KMCK | 3 |
| McGrath Airport | McGrath | MCG · PAMC | 2 |
| McKellar-Sipes Regional Airport | Jackson | MKL · KMKL | 2 |
| Meadows Field | Bakersfield | BFL · KBFL | 2 |
| Mekoryuk Airport | Mekoryuk | MYU · PAMY | 1 |
| Melbourne Orlando International Airport | Melbourne | MLB · KMLB | 3 |
| Memorial Field Airport | Hot Springs | HOT · KHOT | 2 |
| Merced Regional Macready Field | Merced | MCE · KMCE | 1 |
| Merle K (Mudhole) Smith Airport | Cordova | CDV · PACV | 2 |
| Merrill Field | Anchorage | MRI · PAMR | 3 |
| Mesa Gateway Airport | Mesa | AZA · KIWA | 3 |
| Miami-Opa Locka Executive Airport | Miami | OPF · KOPF | 3 |
| Michigan City Municipal Airport | Michigan City | MGC · KMGC | 1 |
| Mid Delta Regional Airport | Greenville | GLH · KGLH | 2 |
| Mid Ohio Valley Regional Airport | Parkersburg (Williamstown) | PKB · KPKB | 2 |
| Middle Georgia Regional Airport | Macon | MCN · KMCN | 2 |
| Midland International Air and Space Port | Midland | MAF · KMAF | 4 |
| Mineral Wells Regional Airport | Mineral Wells | MWL · KMWL | 2 |
| Minot International Airport | Minot | MOT · KMOT | 2 |
| Missoula Montana Airport | Missoula | MSO · KMSO | 1 |
| Mobile Regional Airport | Mobile | MOB · KMOB | 2 |
| Molokai Airport | Kaunakakai | MKK · PHMK | 2 |
| Monroe Regional Airport | Monroe | MLU · KMLU | 2 |
| Monterey Regional Airport | Monterey | MRY · KMRY | 2 |
| Montgomery Regional (Dannelly Field) Airport | Montgomery | MGM · KMGM | 2 |
| Montrose Regional Airport | Montrose | MTJ · KMTJ | 2 |
| Morgantown Municipal Airport Walter L. (Bill) Hart Field | Morgantown | MGW · KMGW | 1 |
| Muskegon County Airport | Muskegon | MKG · KMKG | 2 |
| Nantucket Memorial Airport | Nantucket | ACK · KACK | 2 |
| New Bedford Regional Airport | New Bedford | EWB · KEWB | 2 |
| New York Stewart International Airport | Newburgh | SWF · KSWF | 2 |
| Newport News Williamsburg International Airport | Newport News | PHF · KPHF | 2 |
| Newport State Airport | Newport | NPT · KUUU | 2 |
| Niagara Falls International Airport | Niagara Falls | IAG · KIAG | 2 |
| Nome Airport | Nome | OME · PAOM | 2 |
| North Central West Virginia Airport | Bridgeport | CKB · KCKB | 1 |
| North Platte Regional Airport Lee Bird Field | North Platte | LBF · KLBF | 2 |
| Northeast Florida Regional Airport | St Augustine | UST · KSGJ | 6 |
| Northeast Wyoming Regional Airport | Gillette | GCC · KGCC | 2 |
| Northway Airport | Northway | ORT · PAOR | 1 |
| Northwest Alabama Regional Airport | Muscle Shoals | MSL · KMSL | 2 |
| Northwest Arkansas National Airport | Fayetteville/Springdale/Rogers | XNA · KXNA | 2 |
| Northwest Florida Beaches International Airport | Panama City Beach | ECP · KECP | 1 |
| Nuiqsut Airport | Nuiqsut | NUI · PAQT | 1 |
| Ocean City Municipal Airport | Ocean City | OCE · KOXB | 2 |
| Ogden Hinckley Airport | Ogden | OGD · KOGD | 2 |
| Ogdensburg International Airport | Ogdensburg | OGS · KOGS | 1 |
| Olympia Regional Airport | Olympia | OLM · KOLM | 2 |
| Orcas Island Airport | Eastsound | ESD · KORS | 1 |
| Owensboro Daviess County Airport | Owensboro | OWB · KOWB | 2 |
| Page Municipal Airport | Page | PGA · KPGA | 2 |
| Pangborn Memorial Airport | Wenatchee | EAT · KEAT | 1 |
| Patrick Leahy Burlington International Airport | Burlington | BTV · KBTV | 2 |
| Pellston Regional Airport of Emmet County Airport | Pellston | PLN · KPLN | 2 |
| Petersburg James A Johnson Airport | Petersburg | PSG · PAPG | 1 |
| Pierre Regional Airport | Pierre | PIR · KPIR | 2 |
| Pitt-Greenville Airport | Greenville | PGV · KPGV | 2 |
| Platinum Airport | Platinum | PTU · PAPM | 1 |
| Plattsburgh International Airport | Plattsburgh | PBG · KPBG | 1 |
| Pocatello Regional Airport | Pocatello | PIH · KPIH | 2 |
| Point Lay LRRS Airport | Point Lay | PIZ · PPIZ | 1 |
| Port Heiden Airport | Port Heiden | PTH · PAPH | 2 |
| Portsmouth International Airport at Pease | Portsmouth | PSM · KPSM | 1 |
| Prescott Regional Airport - Ernest A. Love Field | Prescott | PRC · KPRC | 3 |
| Presque Isle International Airport | Presque Isle | PQI · KPQI | 2 |
| Provo Municipal Airport | Provo | PVU · KPVU | 2 |
| Pueblo Memorial Airport | Pueblo | PUB · KPUB | 3 |
| Pullman-Moscow Regional Airport | Pullman | PUW · KPUW | 1 |
| Punta Gorda Airport | Punta Gorda | PGD · KPGD | 3 |
| Purdue University Airport | West Lafayette | LAF · KLAF | 2 |
| Quad City International Airport | Moline | MLI · KMLI | 3 |
| Quincy Regional Airport Baldwin Field | Quincy | UIN · KUIN | 3 |
| Raleigh County Memorial Airport | Beaver | BKW · KBKW | 2 |