on december 9, 2019, delta air lines announced it took a stake in wheels up, a us air charter operator founded in 2013 and operating 120 aircraft (king air 350i twin turboprops, citation excels/xlss, citation xs and hawker 400xp business jets) for its 7,700 members, to became its largest investor and merge it in the first quarter of 2020 with its delta private jets subsidiary, to operate a fleet of 190 business aircraft.