I'm sorry, but that is one of the weakest arguments I'm seen in this thread. You mean to tell me that just because AA held route authorities in 1978 that DL isn't competing on a level playing field ex-JFK? Let's get real.And you somehow forget that the airline industry was regulated for its first 50 or so years of existence. The backbone of AA’s route system under the regulated era was the transcontinental markets via Chicago. AA had a 50 year running head start in serving those markets.
But this isn’t just about AA. It’s about any responsible business that has had a 50 year head start on its competitors. AA has and should have a revenue premium in the markets which it pioneered. Just as DL has and does have a revenue premium in its core markets. No legacy airline has grown to a dominant position in another airline’s key markets without an acquisition.
The reality is that despite having a hub at JFK, DL was unable to command a revenue premium on key routes like JFK-LAX/SFO. In fact, DL couldn't handle the B6 competition and went downmarket to try to compete like a LCC. In the meantime, BOTH AA and UA have stayed upmarket and command a substantial revenue premium over DL. In an apples to apples situation, DL couldn't keep up with the other two.