- Northeast Alabama Regional AirportIdent: KGADServes: Gadsden
- Northeast Kingdom International AirportIdent: KEFKServes: Newport
- Northeastern Regional AirportIdent: KEDEServes: Edenton
- Northern Aroostook Regional AirportIdent: KFVEServes: Frenchville
- Northern Lights AirportIdent: VT46Serves: Alburg
- Northern Lite AirportIdent: 00WIServes: Waupaca
- Northome Municipal AirportIdent: 43YServes: Northome
- Northport AirportIdent: 38WIServes: Royalton
- Northstar AirportIdent: 38WTServes: Davenport
- Northumberland County AirportIdent: KN79Serves: Shamokin
- Northway AirportIdent: NY97Serves: Morrisonville
- Northwest Missouri Regional AirportIdent: KEVUServes: Maryville
- Northwood AirportIdent: 2MO2Serves: Holt
- Northwood AirportIdent: NH84Serves: Northwood
- Northwood AirstripIdent: US-0654Serves: Wonewoc
- Northwood Municipal Airpiort - Vince FieldIdent: K4V4Serves: Northwood
- Northwood Municipal AirportIdent: 5D2Serves: Northwood
- Northwoods AirportIdent: 72MIServes: Watersmeet
- Norton FieldIdent: 75MIServes: Memphis
- Norton Municipal AirportIdent: KNRNServes: Norton
- Norwalk Huron County AirportIdent: K5A1Serves: Norwalk
- Norwich AirportIdent: 49KServes: Norwich
- Novotny/Tonar Farms AirportIdent: NE88Serves: Valparaiso
- Nowata Municipal AirportIdent: H66Serves: Nowata
- Nowatzski FieldIdent: 13WIServes: Markesan
- Nowhere AirportIdent: 00TTServes: Goodlett
- NR3 Farms AirportIdent: US-7303Serves: Sumterville
- Nueces County AirportIdent: KRBOServes: Robstown
- Nugget Bench AirportIdent: 33AKServes: Nugget Bench
- Nuggs Flying M AirportIdent: TE68Serves: Pottsboro
- Nulato AirportIdent: PANUServes: Nulato
- Nulltown Wingnuts UltralightportIdent: 73IIServes: Connersville
- Number 18 AirportIdent: UT13Serves: South Jordan
- Numidia AirportIdent: 8PA0Serves: Catawissa
- Nunapitchuk AirportIdent: 16AServes: Nunapitchuk
- Nushagak AirportIdent: AK21Serves: Dillingham
- Nut Tree AirportIdent: KVCBServes: Vacaville
- Nyac AirportIdent: ZNCServes: Nyac
- O K Flying Club Inc AirportIdent: 28ISServes: Fillmore
- O S Wyatt AirportIdent: 14TSServes: Realitos
- O'Brien Airpark East/West AirportIdent: FD71Serves: Branford
- O'Brien Flying Service AirportIdent: LA71Serves: Iowa
- O'Connor FieldIdent: 8IL5Serves: Pecatonica
- O'Neal AirportIdent: KOEAServes: Lawrenceville
- O'Neill Municipal Airport–John L Baker FieldIdent: KONLServes: O'Neill
- O'Toole Ranch AirportIdent: NV02Serves: Austin
- OAG Unmanned Center AirportIdent: US-12643Serves: Piney Point
- Oak Country Ranch AirportIdent: 33CLServes: Paso Robles
- Oak Glen Ranch AirportIdent: 3TS9Serves: Cooper
- Oak Grove Marine Corps Outlying FieldIdent: 13NCServes: Pollocksville
- Oak Lake Air StripIdent: MN42Serves: Erskine
- Oak Ridge AirparkIdent: MO80Serves: Mountain Grove
- Oak Ridge AirportIdent: FL82Serves: Interlachen
- Oak Ridge AirportIdent: NY16Serves: East Palmyra
- Oak Ridge Farms AirportIdent: 5MO9Serves: New Boston
- Oak Ridge Plantation AirportIdent: 13GAServes: Sumner
- Oak Tree LandingIdent: 6J8Serves: High Springs
- Oakbrook AirportIdent: 47WIServes: Fort Atkinson
- Oakdale AirportIdent: KO27Serves: Oakdale
- Oakes FieldIdent: 66INServes: Charlottesville