Once you are at an airline like American, it makes little sense to move laterally since it's going to be the same pile of sh!t at any other place. The only reason to move would be to a place where you don't have to commute and you like that certain base that certain airline offers. The job itself is not going to be any better and you would have to go through probation again. You are probably better off at American since all the retirements are coming up. Good luck,