- Kirsch Municipal AirportIdent: KIRSServes: Sturgis
- Kiski AirportIdent: 85PNServes: Vandergrift
- Kissack/Reynolds AirportIdent: 22WYServes: Rozet
- Kistler Ranch AirportIdent: 08CLServes: Jamestown
- Kit Carson County AirportIdent: KITRServes: Burlington
- Kitchens FieldIdent: 4GA7Serves: Griffin
- Kite FieldIdent: 97TNServes: Jonesborough
- Kitner AirportIdent: 0PN4Serves: New Bloomfield
- Kits AirportIdent: 5OK0Serves: Hydro
- Kitty Hawk Estates AirportIdent: 9WI6Serves: Polar
- Kitty Hawk Farm UltralightportIdent: 2KY1Serves: Paint Lick
- Kitty Hawk Flying FieldIdent: TS67Serves: Garden Ridge
- Kitty-Wompus AirportIdent: 26WIServes: Exeland
- Kittyhawk Estates AirportIdent: FL09Serves: Live Oak
- Kivalina AirportIdent: PAVLServes: Kivalina
- Kizer FieldIdent: K4F7Serves: Prescott
- Klamar FieldIdent: 77MNServes: Gatzke
- Klaverack AirportIdent: 04NYServes: Hudson
- Kleberg County AirportIdent: KIKGServes: Kingsville
- Kleis AirportIdent: IA30Serves: Zwingle
- Klenawicus AirfieldIdent: US-0767Serves: Shelter Island
- Klies Air StripIdent: MT43Serves: Basin
- Kline FieldIdent: II02Serves: Butler
- Kline Kill AirportIdent: NY1Serves: Ghent
- Klinkerman AirportIdent: 52XAServes: Wichita Falls
- Kloker AirportIdent: IS69Serves: Meredosia
- Klumpp AirportIdent: AL78Serves: Fairhope
- Klutts FieldIdent: 20XSServes: Chisholm
- Kml AirportIdent: 12LAServes: Sulphur
- Knape AirportIdent: 2XA2Serves: Danbury
- Knapp AirportIdent: 6NK0Serves: Schenevus
- Knapp Pecan Orchard AirparkIdent: 5TS3Serves: Dawson
- Knight Aire AirportIdent: 92WIServes: Merrill
- Knight FieldIdent: US-1192Serves: Berkley
- Knight Trow Ranch AirportIdent: 80XAServes: Canton
- Knollwood Farm AirportIdent: 93MDServes: Elkton
- Knowlesville AirportIdent: NY01Serves: Knowlesville
- Knox County AirportIdent: K4I3Serves: Mount Vernon
- Knox Landing AirportIdent: 87NEServes: York
- Knoxville Downtown Island AirportIdent: KDKXServes: Knoxville
- Knoxville Municipal AirportIdent: KOXVServes: Knoxville
- Knutson AirportIdent: 4ND1Serves: Thompson
- Knutson Farms AirportIdent: 3WN6Serves: Chetek
- Knutson FieldIdent: WN39Serves: Wyoceena
- Koala-T-Field AirportIdent: 74MUServes: Hawk Point
- Kobelt AirportIdent: N45Serves: Wallkill
- Kobuk AirportIdent: PAOBServes: Kobuk
- Koch AirportIdent: 91LAServes: Eunice
- Koch AirportIdent: IS71Serves: Durand
- Koch FieldIdent: 11IAServes: Hudson
- Kodiak Municipal AirportIdent: PAKDServes: Kodiak
- Koenig AirparkIdent: LS92Serves: Robert
- Koenig AirportIdent: 0LL3Serves: Jerseyville
- Koenig AirportIdent: 8CO8Serves: Yuma
- Koester FieldIdent: US-0154Serves: St. Wendel
- Kogru River AirportIdent: 1AA1Serves: Nuiqsut
- Kohles AirportIdent: NE78Serves: Norfolk
- Kohlhaas AirportIdent: IA83Serves: Livermore
- Koinzan AirportIdent: NE44Serves: Elgin
- Koke AirportIdent: NE49Serves: Gretna