| TCS | KTCS | Truth Or Consequences Municipal Airport | Truth Or Consequences | |
| TBC | - | Tuba City Airport | Tuba City | |
| - | - | Tuck | South Boston | |
| - | - | Tucker-Guthrie Memorial | Harlan | |
| TCC | KTCC | Tucumcari Airport | Tucumcari | |
| - | - | Tulelake Municipal | Tulelake | |
| - | - | Tulsa Security | Tulsa | |
| - | - | Turlock Municipal | Turlock | |
| - | - | Turner | Turner | |
| - | - | Turner Co | Ashburn | |
| - | - | Turners Falls | Montague | |
| - | - | Turtle Lake Municipal | Turtle Lake | |
| - | - | Tuweep | Tuweep | |
| TNP | KNXP | Twentynine Palms Airport | Twentynine Palms | |
| - | - | Twin Bridges | Twin Bridges | |
| - | - | Twin Bridges Emergency | Ketchum | |
| - | - | Twin City | Marble Hill | |
| - | - | Twin City | Loris | |
| - | - | Twin Lakes | Mocksville | |
| - | - | Twin Lakes | Graniteville | |
| - | - | Twin Mountain | Twin Mountain | |
| - | - | Twin Oaks | San Antonio | |
| - | - | Twin Pine | Pennington | |
| - | - | Twisp Municipal | Twisp | |
| - | - | Twitchell | Turner | |
| TWH | - | Two Harbors Airport | Catalina Island | |
| - | - | Tyler Co | Woodville | |
| - | - | Tyler Municipal | Tyler | |
| TYE | - | Tyonek Airport | Tyonek | |
| UGS | - | Ugashik Airport | Ugashik | |
| - | PAKU | Ugnu Kuparuk | Ugnu Kuparuk | |
| - | KULS | Ulysses | Ulysses | |
| - | - | Umatilla Municipal | Umatilla | |
| UMT | PAUM | Umiat Airport | Umiat | |
| UNS | - | Umnak Island Airport | Umnak Island | |
| - | - | Union Co | Columbus | |
| - | - | Union Co-Shelton | Union | |
| - | - | Union Municipal | Union | |
| JLX | - | Union Station Heliport | Los Angeles | |
| AFF | KAFF | United States Air Force Academy Airport | Colorado Springs | |
| JLH | - | United States Army Heliport | Arlington Heights | |
| NDV | - | United States Naval Heliport | Anacostia | |
| JUC | - | Universal City Heliport | Los Angeles | |
| - | - | University | Bath | |
| - | - | University Airport | Davis | |
| UPP | PHUP | Upolu Point Airport | Upolu Point | |
| UKT | KUKT | Upper Bucks Airport | Quakertown | |
| - | KSRB | Upper Cumberland Regional Airport | Sparta | |
| - | - | Upper Loon Creek Usfs | Challis | |
| - | - | Upshur Co | Buckhannon | |