what? You did like that someone actually can up with an answer that an airline actually did close up shop? So you are now dismissing it because it happened before you were born so now it doesn’t count?

here then, another airline that closed up shop and went out of business in the United States;

Legend Airlines

https://en.m.wikipedia.org/wiki/Legend_Airlines

tell me you don’t like that answer and I’ll give you another airline.