Originally Posted by
mvoight
Per AA's terms and conditions, I believe it is even enough to get a refund
You can get a refund, but changing to a later flight may cause additional charges
See this
IN THE EVENT, AFTER TICKET ISSUANCE, SCHEDULE CHANGES ARE MADE BY AA THAT… RESULT IN A SUBSTITUTION OF EQUIPMENT NOT ACCEPTABLE TO THE PASSENGER… THE PASSENGER WILL HAVE THE OPTION OF CANCELLING WITHOUT PENALTY, OR REROUTING ON DIFFERENT FLIGHTS TO/FROM THE SAME OR DIFFERENT DESTINATION. HOWEVER, THE PASSENGER MUST PAY ANY ADDITIONAL AMOUNTS RESULTING FROM THE REROUTING.