United Airlines Holdings Inc. is reportedly among several carriers being investigated by the Federal Aviation Administration (FAA). The probe centers on allegations that these airlines operated flights exceeding mandated capacity restrictions at major U.S. hubs during the government shutdown in November 2025. The investigation is examining flights that occurred between November 12 and November 17, when the restrictions were still in effect to manage air traffic control staffing shortages. If found to have violated the FAA's order, which was implemented to ensure the safety of the National Airspace System, United and other airlines could face millions of dollars in fines. There has been no immediate public comment from United Airlines regarding the investigation, and no significant market reaction has been reported in the available sources. The outcome of the FAA's inquiry will determine the financial impact and any potential operational consequences for the airline.