| 3AZ2 | U Of A Maricopa Ag Center Airport | Maricopa AZ |
| 9TA7 | U Of Texas Medical Branch Emergency Room Heliport | Galveston TX |
| 9TS7 | U Of Texas Medical Branch Ewing Hall Heliport | Galveston TX |
| N46 | U S Heliport | Wingate NC |
| MA42 | U S C G Heliport | Gloucester MA |
| TX57 | U S Coast Guard Station Heliport | Port Isabel TX |
| CL76 | U S Naval Hospital San Diego Heliport | San Diego CA |
| TA80 | U U Ranch Airport | Whitesboro TX |
| AR29 | Uams Heliport | Little Rock AR |
| CN11 | Uc Davis Medical Center Life Flight Base Heliport | Sacramento CA |
| 3CL0 | Uc Davis Medical Center Tower Ii Heliport | Sacramento CA |
| 1CL4 | Uci Medical Center Heliport | Orange CA |
| CT75 | Uconn Health Center Heliport | Farmington CT |
| 52CA | Ucsd Health System East Campus Interim Heliport | La Jolla CA |
| 20CN | Ucsd Medical Center Hillcrest Heliport | San Diego CA |
| 2WI1 | Uff-da Airport | Stoughton WI |
| 9A8 | Ugashik Airport | Ugashik AK |
| UGB | Ugashik Bay Airport | Pilot Point AK |
| UBW | Ugnu-kuparuk Airport | Kuparuk AK |
| UT61 | Uintah Basin Medical Center Heliport | Roosevelt UT |
| 37KY | Uk Hospital Heliport | Lexington KY |
| 93KY | Uk Patient Care Heliport | Lexington KY |
| UKI | Ukiah Muni Airport | Ukiah CA |
| 39CN | Ukiah Valley Medical Center Heliport | Ukiah CA |
| 0TS4 | Ullrich Airport | Ledbetter TX |
| CT60 | Ultimate Heliport | Bristol CT |
| 3MO2 | Ultra Flight Airpark Ultralight | Berger MO |
| MY62 | Ultraflyte, Inc Ultralight | Jenkins MN |
| NK89 | Ultralight Flight Farm Ultralight | Monterey NY |
| 0TS2 | Ultralight Intl Ultralight | Haslet TX |
| 67NY | Ultralight Port Ultralight | Little Valley NY |
| ULS | Ulysses Airport | Ulysses KS |
| 1MA2 | Umass Memorial Medical Center-univ Campus Heliport | Worcester MA |
| X23 | Umatilla Muni Airport | Umatilla FL |
| UMT | Umiat Airport | Umiat AK |
| MI32 | Ummc Heliport | Ann Arbor MI |
| VG37 | Umphlett Airstrip Airport | Whaleyville VA |
| 58OR | Umpqua Airport | Roseburg OR |
| UNK | Unalakleet Airport | Unalakleet AK |
| DUT | Unalaska Airport | Unalaska AK |
| IS80 | Uncle Chuck's Airport | De Kalb IL |
| 6MN8 | Underland Airstrip Airport | Medford MN |
| ND44 | Underwood Airport | Underwood ND |
| 44WY | Underwood Airport | Douglas WY |
| 7NA2 | Undlin Airstrip Airport | Lansford ND |
| LA26 | Unicorn Airport | Folsom LA |
| 69FD | Unicorn Place Airport | Defuniak Springs FL |
| 5NC8 | Unifi Heliport | Yadkinville NC |
| MRT | Union County Airport | Marysville OH |
| 35A | Union County, Troy Shelton Field Airport | Union SC |
| 9CL8 | Union Eva Heliport | Huntington Beach CA |
| 1GA3 | Union General Hospital Heliport | Blairsville GA |
| 60II | Union Hospital Heliport | Terre Haute IN |
| 13OI | Union Hospital Heliport | Dover OH |
| 2II8 | Union Hospital Clinton Heliport | Clinton IN |
| AR48 | Union Medical Center Heliport | El Dorado AR |
| 44MD | Union Memorial Hospital Heliport | Baltimore MD |
| 2NC2 | Union Memorial Hospital Inc Heliport | Monroe NC |
| 3MS9 | Union Muni Airport | Union MS |
| F87 | Union Parish Airport | Farmerville LA |
| 22PA | Uniontown Hospital Heliport | Uniontown PA |
| K43 | Unionville Muni Airport | Unionville MO |
| AZ30 | United Bank Plaza Heliport | Phoenix AZ |
| 8CL8 | United Ca Bank Data Processing Ops Heliport | Los Angeles CA |
| 4VA7 | United Coal Heliport | Grundy VA |
| MN14 | United Hospital District Heliport | Blue Earth MN |
| 3WV7 | United Medical Center Heliport | Bridgeport WV |
| SC76 | Unity Aerodrome Airport | Lancaster SC |
| OK99 | Unity Health Center Heliport | Shawnee OK |
| 8IA0 | Unity Healthcare Heliport | Muscatine IA |
| 55NK | Unity Hospital Heliport | Rochester NY |
| IL04 | Unity Point Health - Methodist Heliport | Peoria IL |
| NJ87 | Univ Of Medicine & Dentistry Rooftop Heliport | Newark NJ |
| 37TN | Univ Of Tennessee Lifestar Sweetwater Heliport | Sweetwater TN |
| 09TN | Univ Of Tennessee Medical Center Heliport | Knoxville TN |
| 61NE | Univ. Of Ne Medical Center Heliport | Omaha NE |
| II64 | Universal Mine Heliport | Universal IN |
| EDU | University Airport | Davis CA |
| 41G | University Airpark Airport | Bath MI |
| XS85 | University Health System Heliport | San Antonio TX |
| 6AR3 | University Hospital Heliport | Little Rock AR |
| GA13 | University Hospital Heliport | Augusta GA |
| 26KY | University Hospital Heliport | Louisville KY |
| WV51 | University Hospital Heliport | Morgantown WV |
| 2OI6 | University Hospital East Heliport | Columbus OH |
| 8OH9 | University Hospital/sicu Heliport | Cincinnati OH |
| MU37 | University Hospitals & Clinics Heliport | Columbia MO |
| 77OI | University Hospitals Of Cleveland Heliport | Cleveland OH |
| TA41 | University Medical Center Heliport | El Paso TX |
| TA79 | University Medical Center Heliport | Lubbock TX |
| 5AZ4 | University Medical Center Hospital Heliport | Tucson AZ |
| 5MN3 | University Medical Center Mesabi Heliport | Hibbing MN |
| NV34 | University Medical Center-southern Nevada Heliport | Las Vegas NV |
| AL38 | University Of Alabama Hospital Heliport | Birmingham AL |
| 4IS3 | University Of Chicago Hospitals Heliport | Chicago IL |
| 53FL | University Of Florida Heliport | Gainesville FL |
| CMI | University Of Illinois-willard Airport | Champaign/urbana IL |
| 1IA7 | University Of Iowa Hospitals & Clinic Heliport | Iowa City IA |
| IA92 | University Of Iowa Hospitals & Clinic No2 Heliport | Iowa City IA |
| 10KS | University Of Kansas Hospital Heliport | Kansas City KS |
| MD71 | University Of Maryland Shock Trauma Center Heliport | Baltimore MD |
| 4MS6 | University Of Mississippi Medical Center Heliport | Jackson MS |
| MY65 | University Of Mn Hospitals & Clinics Heliport | Minneapolis MN |
| NM11 | University Of Nm Hospital Heliport | Albuquerque NM |
| OUN | University Of Oklahoma Westheimer Airport | Norman OK |
| PN22 | University Of Pitt Medical Landing Area Heliport | Bradford PA |
| PN23 | University Of Pittsburgh Med Center Mercy Heliport | Pittsburgh PA |
| 74OH | University Of Toledo Medical Center Heliport | Toledo OH |
| 8VA5 | University Of Virginia Hospital Heliport | Charlottesville VA |
| UNV | University Park Airport | State College PA |
| 2OI5 | University Pointe Medical Office Bldg Heliport | Mason OH |
| UOX | University-oxford Airport | Oxford MS |
| 1MA5 | Unknown Field Airport | Southborough MA |
| 5TS1 | Uno Mas Ranch Airport | Cotulla TX |
| 0II1 | Unsicker Airport | Bremen IN |
| IS83 | Untied Acres Airport | Belvidere IL |
| 4IL9 | Unzicker Airport | Benson IL |
| 98MN | Up Yonder Airport | Bemidji MN |
| 27SC | Upair Heliport | Lugoff SC |
| W94 | Upda Airport | Williamsburg VA |
| TA32 | Upham Heliport | Mineral Wells TX |
| PS67 | Uphill Airport | Claysville PA |
| 6PN0 | Upmc East Heliport | Monroeville PA |
| PN76 | Upmc Northwest Heliport | Seneca PA |
| PA56 | Upmc Passavant Cranberry Heliport | Cranberry PA |
| PS41 | Upmc-horizon Hospital/shenango Campus Heliport | Farrell PA |
| UPP | Upolu Airport | Hawi HI |
| 03MD | Upper Chesapeake Medical Center Heliport | Bel Air MD |
| SRB | Upper Cumberland Rgnl Airport | Sparta TN |
| AK74 | Upper Hannum Creek Airport | Hannum Creek AK |
| U72 | Upper Loon Creek Usfs Airport | Challis ID |
| HI29 | Upper Paauau Airport | Pahala HI |
| HI27 | Upper Paauilo Airstrip Airport | Paauilo HI |
| 3K9 | Upper Wasilla Lake Seaplane Base | Wasilla AK |
| 2VG2 | Upperville Airport | Upperville VA |
| W22 | Upshur County Rgnl Airport | Buckhannon WV |
| 75NK | Upstate Medical University Hospital Heliport | Syracuse NY |
| E48 | Upton County Airport | Mc Camey TX |
| 83V | Upton Muni Airport | Upton WY |
| 8OH5 | Urban Airport | Cortland OH |
| 9MO7 | Urbana Area Medical Heliport | Urbana MO |
| IS12 | Urso Heliport | Bartlett IL |
| 36PN | Us Army Reserve Center Heliport | Edgemont PA |
| EBY | Us Coast Guard Station Neah Bay Heliport | Neah Bay WA |
| DC03 | Us Park Police Eagle's Nest Heliport | Washington DC |
| MA57 | Us Property & Fiscal Office Heliport | Natick MA |
| AL52 | Usa Medical Center Heliport | Mobile AL |
| AFF | Usaf Academy Afld Airport | Colorado Springs CO |
| CO90 | Usaf Academy Bullseye Aux Airfield Airport | Ellicott CO |
| SC53 | Usar Center, Clemson Heliport | Clemson SC |
| CL00 | Usc University Hospital Heliport | Los Angeles CA |
| 6XS6 | Uscg Port Safety Station Heliport | Houston TX |
| 0PS5 | Used Parts Heliport | East Bangor PA |
| 5Q2 | Usfs Chester Heliport | Chester CA |
| CT91 | Ussc Heliport | Norwalk CT |
| CT34 | Ussc/north Haven Heliport | North Haven CT |
| UT05 | Utah National Guard Headquarters Heliport | Draper UT |
| UT51 | Utah Valley Rgnl Medical Center Heliport | Provo UT |
| LS74 | Utec Heliport | Lake Charles LA |
| 68XA | Utley Airport | Bastrop TX |
| 2OA7 | Utter Field Airport | Felicity OH |
| 2XS9 | Uvalde County Hospital Authority Heliport | Uvalde TX |
| WS27 | Uw Hospital & Clinics Heliport | Madison WI |
