Originally Posted by
xliioper
Note that this was part of ongoing series of DL credit extensions. Normally, with credits from DL domestic fares, all travel must be completed within one year of date of ticket issue.
I seem to recall the pre-covid rules domestic had to be booked and flown within the year but international had to be rebooked within the year but flown within 330 days after the one year expiry. So book a dummy international flight 330 days out until you decide what your final plans are.