Originally Posted by
jhflau11
I got denied last week. Was Flying DCA-SEA on AS. Wouldn't let me in with my AMEX Plat. Said I had to be on a Delta flight.
True..if that was the ONLY flight you were on that day.
But the OP has a DL flight that day, even though it does not originate or end in DCA. Thus I believe meballard is correct.