- Umatilla Municipal AirportIdent: X23Serves: Umatilla
- Umiat AirportIdent: PAUMServes: Umiat
- Umphlett AirstripIdent: VG37Serves: Whaleyville
- Umpqua AirportIdent: 58ORServes: Roseburg
- Umpqua RV Park Fly In AirportIdent: 94ORServes: Elkton
- Uncle Chuck's AirportIdent: IS80Serves: DeKalb
- Uncle Kenny's AerodromeIdent: 69OKServes: Fairland
- Uncle Raymonds AirportIdent: TS19Serves: Giddings
- Underland AirstripIdent: 6MN8Serves: Medford
- Underline OK AirportIdent: US-0997Serves: Springtown
- Underwood AirportIdent: 44WYServes: Douglas
- Underwood AirportIdent: ND44Serves: Underwood
- Undlin AirstripIdent: 7NA2Serves: Lansford
- Unger FieldIdent: 0OI2Serves: Greenfield
- Unicorn AirportIdent: LA26Serves: Folsom
- Unicorn Place AirportIdent: 69FDServes: Defuniak Springs
- Union County AirportIdent: KMRTServes: Marysville
- Union County, Troy Shelton FieldIdent: K35AServes: Union
- Union Municipal AirportIdent: 3MS9Serves: Union
- Union Parish AirportIdent: KF87Serves: Farmerville
- Unionville Municipal AirportIdent: K43Serves: Unionville
- Unity AerodromeIdent: SC76Serves: Lancaster
- Unity AirportIdent: 11OGServes: Unity
- University AirparkIdent: 41GServes: Bath
- University AirportIdent: KEDUServes: Davis
- University of Oklahoma Westheimer AirportIdent: KOUNServes: Norman
- Unknown FieldIdent: 1MA5Serves: Southborough
- Untied Acres AirportIdent: IS83Serves: Belvidere
- Unzicker AirportIdent: 4IL9Serves: Benson
- Up Yonder AirportIdent: 98MNServes: Laporte
- Uphill AirportIdent: PS67Serves: Claysville
- Upland-Cable AirportIdent: KCCBServes: Upland
- Upolu AirportIdent: PHUPServes: Hawi
- Upper Cumberland Regional AirportIdent: KSRBServes: Sparta
- Upper Hannum Creek AirportIdent: 4Z2Serves: Hannum Creek
- Upper Loon Creek US Forest Service AirportIdent: U72Serves: Challis
- Upper Paauilo AirstripIdent: HI27Serves: Paauilo
- Upperville AirportIdent: 2VG2Serves: Upperville
- Upshur County Regional AirportIdent: KW22Serves: Buckhannon
- Upton Municipal AirportIdent: 83VServes: Upton
- Urban AirportIdent: 8OH5Serves: Cortland
- US Trinity AirportIdent: TX22Serves: Argyle
- USAF Academy AirfieldIdent: KAFFServes: Colorado Springs
- Usaf Academy Bullseye Aux AirstripIdent: CO90Serves: Ellicott
- Utter FieldIdent: 2OA7Serves: Felicity
- V Bar AirstripIdent: US-12714Serves: Fairfield
- V-Bar AirportIdent: 4TA2Serves: China Spring
- Vada AirportIdent: US-4985Serves: Climax
- Vaiden FieldIdent: KA08Serves: Marion
- Vaiden Landing AirportIdent: MS64Serves: Hernando
- Val Air AirportIdent: CD82Serves: Durango
- Valenov Ranch AirportIdent: ID61Serves: Priest River
- Valenty Mierek AirportIdent: NY59Serves: Ava
- Valhalla AirportIdent: 84CServes: North Cape
- Valhalla AirportIdent: IN91Serves: Fort Wayne
- Valier AirportIdent: K7S7Serves: Valier
- Valkaria AirportIdent: KX59Serves: Malabar
- Valle AirportIdent: K40GServes: Grand Canyon
- Valley AirportIdent: 3OK0Serves: Ada
- Valley City Flying Club AirportIdent: 78OHServes: Valley City