FWIW, I gave up 2000 seniority numbers to come to DL over AA, and I live in an AA base. I can drive to PHL in 40 minutes, or I can drive to JFK in 2 hours. I have ZERO regrets making the choice to go to Delta. With 32 years left, your priorities may change over time. DL offers you three bases within the same distance and many options for fleets.

AA will gain you more seniority, no question, I just don’t think it’s worth it.