Originally Posted by
HWGeeks
if they canceled the flight, they should even exchange However if you were thinking of even exchanging 6 months later that is a bit excessive. Delta normally only even exchanges within a few days of the canceled flight. Although the Pandemic Delta has been generous when the cancelation is pandemic related.
I don't think anyone is being an apologist for delta, you decided on a credit.
If I understand the OP correctly, OP has already flown part of the ticket. Moving the return flight forward by six months probably violates maximum stay requirements in the fare rules, which are typically three months or ninety days unless a full fare fully refundable ticket was purchased.