Yes, there is a very real and highly restricted No Fly List, which is a subset of the broader U.S. government Terrorist Screening Database (TSDB) maintained by the FBI's Terrorist Screening Center. Individuals on this list are strictly prohibited from boarding any commercial aircraft that flies into, out of, or over United States airspace. In 2026, while the exact number of names is classified, it is estimated to contain several thousand people. [Image showing the process of TSA Secure Flight passenger data screening against the No Fly List] It is important to distinguish the federal No Fly List from the "Internal Banned Lists" maintained by individual airlines (like Delta or United). If you are banned from Delta for unruly behavior, you can still fly on American; however, if you are on the federal No Fly List, you cannot fly on any airline. If you are frequently stopped for "Secondary Security Screening Selection" (SSSS) on your boarding pass, you are not necessarily on the No Fly List, but likely on a "Selectee List" that requires extra scrutiny. Legitimate travelers who believe they have been misidentified can seek "Redress" through the DHS TRIP program to obtain a Redress Number.