In 2026, an individual is typically placed on the No Fly List (managed by the FBI's Terrorist Screening Center in the US) if they are deemed a serious threat to civil aviation or national security. The most common reasons include known or suspected involvement in terrorist activities, making credible threats against an aircraft, or being a high-level member of a banned extremist organization. However, 2026 has seen a rise in "administrative" no-fly lists managed by individual airlines for unruly passenger behavior. This includes physically assaulting crew members, repeatedly refusing to follow safety instructions, or engaging in "air rage" incidents that require a flight to be diverted. While the government list is for national security, airline-specific bans are for safety; in 2026, some major carriers share their "internal" ban lists to prevent high-risk, abusive passengers from simply switching to a competitor.