I purchased a ticket for $323 and change on Oct 2022. Ended up cancelling the ticket in early 2023 but then purchasing a much more expensive ticket in March 2023 with that e credit and credit card. I was now looking at cancelling and called Delta to see what the expiration date of the credits will be. My expectation was the $323 would expire 12/31/23 and the remainder in March or maybe Dec 31 2024. Delta said no, the entire amount expires 12/31/23. Is that correct?