Do you know why this didn't apply regarding JetBlue trying to acquire Spirit?
One outcome is Spirit goes into bankruptcy reorganization and still operates, which is hardly unprecedented for an American airline. Nearly every major airline has filed for Chapter 11 since 2002, the lone exception being Southwest.
It’s always interesting that Chapter 11 is a way out of pension promises. That someone can take employment at a certain wage, and then the company can renege on the back half of the compensation once the person retires.
Philip Greenspun has a good writeup about why that is: https://philip.greenspun.com/flying/unions-and-airlines