RE:Berkshire sells all holdings in largest U.S. airlines 99% of people cannot afford netjets, wheels up, etc yes the airline industry has been hit hard by covid 19 but it will rebound, you will never stop people from travelling, you may slow them down for a while but it will come back.
Anyways Chourus market is pretty much domestic , I realize that a % of their passenger load feed the international market but I don't think that you can compare Chorus business plan to Delta's United or any other large US Carrier.