Originally Posted by
physioprof
SDC data point: Changing from a 7AM flight tomorrow to a 9AM flight, the Web site tried to charge me $200 change fee, but the Android app worked correctly and did it for no charge.
This is one of the reasons it's suggested the website not be used for SDC.
I just updated the wiki to make this comment more strongly. Your best bets are the mobile app, a kiosk, or a phone agent.