More than 2,000 people have been placed on U.S. airlines' internal no-fly lists since carriers stepped up enforcement of their mandatory mask requirements in June.
United Airlines told ABC News it has banned 60 people in the last week alone which is higher than their previous week averages.
Many of the instances over the past week appear to be politically motivated, with people flying to and from Washington, D.C., following the riot on Capitol Hill.
