is there any value to United Airlines stock from before their bankruptcy?

Answer 1

If you were a shareholder before the bankruptcy, you should have received some paperwork describing the effects of the filing.

In any event, here's what it says in United's 10-K:

Pursuant to the Plan of Reorganization, UAL common stock, preferred stock and Trust Originated Preferred Securities ("TOPrS") issued prior to the Petition Date were canceled on the Effective Date, and no distribution will be made to holders of those securities.

Answer 2

no, UA is poorly managed. Southwest has been the best airline company to invest in for years...