Originally Posted by VegasGambler

If you want to change the ticket you must go through Amex. The airline won't touch it. Some airlines may offer to "take over" the ticket, probably for a fee, possibly waived for elites. I'm not sure if AS can or will do this. AA was not able to do a SDC or take over my ticket, but I was told that that was due to their contract with Amex over those discounted tickets, so I'm not sure if that would be an issue with AS.