The first stock I ever owned was an airline, Braniff, at about $80. Luckily I sold it for a small loss about a year later. That was about 15 years before Braniff went BK and the stock went to zero. I also owned Flying Tiger airlines, a freight carrier years ago. Think I lost some on that too.
For some reason young newbie investors love airlines. I see that airlines, along with cruise lines, are very popular with RobinHooders. Buffett's history with airlines has been terrible.
It's a sector I'd never touch again.
I do have one aviation/defense stock... Raytheon, which has been a big winner. Most of Boeing's competitors have done well Lockheed, GD, and Northrop Grumman. The sector has been fantastic even if Boeing has had a very rough few years.
Note that I've owned my small amount of BA for about 20 years and still have a huge profit in it.