A hair test performed by a lab does not qualify as a DOT/FAA drug test. Like everything else in the FAA, the paperwork matters. The lab must be a National Institute on Drug Abuse (NIDA) lab. The form used must be the FAA form.

While the FAA and major airlines in 2026 primarily rely on DOT-mandated urine testing for random drug screenings, many "Big Three" airlines (Delta, United, and American) have integrated hair follicle testing into their pre-employment and "return-to-duty" protocols. Hair testing is considered more comprehensive because it can detect substance use over a 90-day window, whereas urine tests generally only show usage within the last 24 to 72 hours. However, hair testing is not currently part of the random DOT (Department of Transportation) federal requirements due to ongoing debates regarding standardization and potential bias. For active-duty pilots, the "random" drug pool remains urine-based, but a pilot being hired or one involved in a significant incident may be subject to a hair test as part of a more intensive screening. Pilots are also subject to rigorous annual medical exams (First Class Medical) where their neurological and psychological health is evaluated. In 2026, the industry remains "zero-tolerance," and any confirmed positive test for prohibited substances—including legal marijuana in certain states—results in the immediate revocation of their pilot's certificate.