alt Hacker NewsThis is such a pervasive argument also used to justify a lot of bad stuff in tech ("if we don't do it, our competitors will" / "if you don't like it, you should have asked the regulators to stop me").
This is a small world. The US has something like ten major airlines. Eight if you don't count subsidiaries. Someone at the first one made a decision to embrace an exploitative pricing model. And then, someone at the second airline looked at this and thought to themselves, "you know, we're not gonna organize a PR campaign to stigmatize it, we're gonna try the same".
I'd argue there's only three "major" carriers: American, United, and Delta.
The rest, such as Frontier, JetBlue, Southwest, Allegiant - are all discount and/or regional airlines.
For example, allegiant flies to most cities secondary airports that are 1-2 hours drive from the city.
EDIT: It's really 4 equally large ones by passenger miles:
* 1 Delta Air Lines 17.8%
* 2 American Airlines 17.5%
* 3 Southwest Airlines 17.3%
* 4 United Airlines 16.0%
The rest are sub 10%