- Moody Air Force BaseIdent: KVADServes: Valdosta
- Morgantown Municipal Airport Walter L. (Bill) Hart FieldIdent: KMGWServes: Morgantown
- Morristown Municipal AirportIdent: KMMUServes: Morristown
- Mountain Home Air Force BaseIdent: KMUOServes: Mountain Home
- Muir Army Air Field (Fort Indiantown Gap) AirportIdent: KMUIServes: Fort Indiantown Gap(Annville)
- Murray FieldIdent: KEKAServes: Eureka
- Muskegon County AirportIdent: KMKGServes: Muskegon
- Nantucket Memorial AirportIdent: KACKServes: Nantucket
- Naples Municipal AirportIdent: KAPFServes: Naples
- NAS Fort Worth JRB / Carswell FieldIdent: KNFWServes: Fort Worth
- Naval Air Station Corpus Christi Truax FieldIdent: KNGPServes: Corpus Christi
- Naval Air Station Key West/Boca Chica FieldIdent: KNQXServes: Key West
- Naval Air Station Meridian / McCain FieldIdent: KNMMServes: Lauderdale
- Naval Air Station Pensacola Forrest Sherman FieldIdent: KNPAServes: Pensacola
- Naval Station Mayport / Admiral David L McDonald FieldIdent: KNRBServes: Jacksonville
- Needles AirportIdent: KEEDServes: Needles
- Nellis Air Force BaseIdent: KLSVServes: Las Vegas
- Nenana Municipal AirportIdent: PANNServes: Nenana
- New Bedford Regional AirportIdent: KEWBServes: New Bedford
- New Braunfels National AirportIdent: KBAZServes: New Braunfels
- New Orleans NAS JRB/Alvin Callender FieldIdent: KNBGServes: New Orleans
- New Richmond Regional AirportIdent: KRNHServes: New Richmond
- New York Stewart International AirportIdent: KSWFServes: Newburgh
- Newport Municipal AirportIdent: KONPServes: Newport
- Newport News Williamsburg International AirportIdent: KPHFServes: Newport News
- Newport State AirportIdent: KUUUServes: Newport
- Niagara Falls International AirportIdent: KIAGServes: Niagara Falls
- Nogales International AirportIdent: KOLSServes: Nogales
- Nome AirportIdent: PAOMServes: Nome
- Norfolk Naval Station (Chambers Field)Ident: KNGUServes: Norfolk
- North Central West Virginia AirportIdent: KCKBServes: Bridgeport
- North Island Naval Air Station-Halsey FieldIdent: KNZYServes: San Diego
- North Las Vegas AirportIdent: KVGTServes: Las Vegas
- North Perry AirportIdent: KHWOServes: Hollywood
- North Platte Regional Airport Lee Bird FieldIdent: KLBFServes: North Platte
- North Texas Regional Airport Perrin FieldIdent: KGYIServes: Denison
- Northeast Florida Regional AirportIdent: KSGJServes: St Augustine
- Northeast Iowa Regional AirportIdent: KCCYServes: Charles City
- Northeast Ohio Regional AirportIdent: KHZYServes: Ashtabula
- Northeast Philadelphia AirportIdent: KPNEServes: Philadelphia
- Northeast Wyoming Regional AirportIdent: KGCCServes: Gillette
- Northern Colorado Regional AirportIdent: KFNLServes: Loveland
- Northway AirportIdent: PAORServes: Northway
- Northwest Alabama Regional AirportIdent: KMSLServes: Muscle Shoals
- Northwest Arkansas National AirportIdent: KXNAServes: Fayetteville/Springdale/Rogers
- Northwest Florida Beaches International AirportIdent: KECPServes: Panama City Beach
- Norwood Memorial AirportIdent: KOWDServes: Norwood
- Nuiqsut AirportIdent: PAQTServes: Nuiqsut
- Oakland County International AirportIdent: KPTKServes: Pontiac
- Ocean City Municipal AirportIdent: KOXBServes: Ocean City
- Ocean Reef Club AirportIdent: 07FAServes: Key Largo
- Oceana Naval Air StationIdent: KNTUServes: Virginia Beach
- Oceanside Municipal AirportIdent: KOKBServes: Oceanside
- Offutt Air Force BaseIdent: KOFFServes: Omaha
- Ogden Hinckley AirportIdent: KOGDServes: Ogden
- Ogdensburg International AirportIdent: KOGSServes: Ogdensburg
- Olympia Regional AirportIdent: KOLMServes: Olympia
- Ontario Municipal AirportIdent: KONOServes: Ontario
- Orangeburg Municipal AirportIdent: KOGBServes: Orangeburg
- Orcas Island AirportIdent: KORSServes: Eastsound