Delta Airlines recently announced that the expiration date for outstanding travel credits and any credits issued this year to passengers who cancel flights has been extended through 2023. You just need to book the new trip by the end of 2023, for travel through 2024.  The new policy includes Delta’s no-frills basic economy tickets, though a cancellation fee will be deducted from the flight credit under new guidelines announced late last year.  Airline tickets and credits generally are good for one year from the date of purchase or issue. Let’s hope other airlines follow Delta’s lead!