So, if I decided to wait it out for DAL, UAL, or AA...

(still very aware that they may never call, and/or I might blow it during an interview if they do)

... at what age do you folks think a pilot in my boat is too old to consider one of those carriers?

I would hate to go to the first carrier I was discussing in this thread and then have to explain in a DAL interview why I left the corporate job and then a year later was looking to leave the new airline job.