To stop your flight from being tracked by the public on sites like FlightAware or FlightRadar24, you must be the owner or operator of the aircraft. For private aircraft, the primary method is to enroll in the FAA’s Limiting Aircraft Data Displayed (LADD) program. This allows you to request that your aircraft’s data be either entirely blocked from external vendors (FAA Source level) or only shared with vendors who agree to hide your tail number from public view (Subscriber level). For even higher privacy, you can use the Privacy ICAO Address (PIA) program, which assigns your aircraft a temporary, alternate transponder code that isn't publicly linked to your registration. If you are a passenger on a commercial airline, there is no way to "stop" the flight from being tracked, as commercial flight data is a matter of public safety and air traffic management. In 2026, while flight tracking is more accurate than ever due to ADS-B technology, these FAA programs remain the only legal way to "cloak" a private tail number from curious eyes.