A change of 60 minutes or more allows a free change of schedule, but not in dates, origin, or destination. A 90+ minute change will allow for a full refund, OR a free schedule change under the 60 minute rule. There's no requirement that they allow you to change dates (even with 90+ minute changes), but if it's within a day of the flight that changed, they might be willing to do it.
Thanks LBJ. I am trying to move my departure for a day.However, the part that has changed is the return portion. Therefore, I am pessimistic about it. The change fee is $300 and in a party of four that is $1,200.
RM