- Unaí AirportIdent: SNUNCountry: Brazil
- Uncle Chuck's AirportIdent: IS80Country: United States
- Uncle Kenny's AerodromeIdent: 69OKCountry: United States
- Uncle Raymonds AirportIdent: TS19Country: United States
- Underland AirstripIdent: 6MN8Country: United States
- Underline OK AirportIdent: US-0997Country: United States
- Underwood AirportIdent: 44WYCountry: United States
- Underwood AirportIdent: ND44Country: United States
- Undilla AirportIdent: YUDLCountry: Australia
- Undlin AirstripIdent: 7NA2Country: United States
- Unger FieldIdent: 0OI2Country: United States
- Uni Frutti AirportIdent: SCUNCountry: Chile
- Unicorn AirportIdent: LA26Country: United States
- Unicorn Place AirportIdent: 69FDCountry: United States
- Uniggel Sementes - Fazenda Santa Maria AirportIdent: SSUSCountry: Brazil
- Unije AirfieldIdent: LDPNCountry: Croatia
- Union County AirportIdent: KMRTCountry: United States
- Union County, Troy Shelton FieldIdent: K35ACountry: United States
- Union Glacier Blue-Ice RunwayIdent: SCGCCountry: Antarctica
- Union Municipal AirportIdent: 3MS9Country: United States
- Union Parish AirportIdent: KF87Country: United States
- Unionville Municipal AirportIdent: K43Country: United States
- Unity AerodromeIdent: SC76Country: United States
- Unity AirportIdent: 11OGCountry: United States
- Unity AirportIdent: CKE8Country: Canada
- University AirparkIdent: 41GCountry: United States
- University AirportIdent: KEDUCountry: United States
- University of Oklahoma Westheimer AirportIdent: KOUNCountry: United States
- Unknown FieldIdent: 1MA5Country: United States
- Unswantz AirstripIdent: SEUWCountry: Ecuador
- Untied Acres AirportIdent: IS83Country: United States
- Unzicker AirportIdent: 4IL9Country: United States
- Up Yonder AirportIdent: 98MNCountry: United States
- Upata AirportIdent: SVUPCountry: Venezuela
- Upavon AerodromeIdent: EGDJCountry: United Kingdom
- Upernavik AirportIdent: BGUKCountry: Greenland
- Uphill AirportIdent: PS67Country: United States
- Upland-Cable AirportIdent: KCCBCountry: United States
- Upolu AirportIdent: PHUPCountry: United States
- Upper Cumberland Regional AirportIdent: KSRBCountry: United States
- Upper Hannum Creek AirportIdent: 4Z2Country: United States
- Upper Horton Wyl AirportIdent: YUPHCountry: Australia
- Upper Kent AirportIdent: CA-0393Country: Canada
- Upper Loon Creek US Forest Service AirportIdent: U72Country: United States
- Upper Paauilo AirstripIdent: HI27Country: United States
- Upperville AirportIdent: 2VG2Country: United States
- Uppsala-Sundbro AirfieldIdent: ESKCCountry: Sweden
- Upshur County Regional AirportIdent: KW22Country: United States
- Upton Municipal AirportIdent: 83VCountry: United States
- Urandangi AirportIdent: YUDGCountry: Australia
- Uranium City AirportIdent: CYBECountry: Canada
- Uraricoera AirportIdent: SJNCCountry: Brazil
- Urban AirportIdent: 8OH5Country: United States
- Uribe AirportIdent: SKUBCountry: Colombia
- Uroubi AirportIdent: AYUECountry: Papua New Guinea
- Ursel Air BaseIdent: EBULCountry: Belgium
- Uru Harbour AirportIdent: AGATCountry: Solomon Islands
- Uruaçu AirportIdent: SWWUCountry: Brazil
- Urucu AirportIdent: SBUYCountry: Brazil
- Uruçuí AirportIdent: SJI3Country: Brazil