No, old Southwest flight credits do not expire, thanks to a major policy shift the airline enacted on July 28, 2022. Under this "first-of-its-kind" policy among major U.S. carriers, any Southwest flight credit that was still valid on that date, or any credit created on or after that date, has no expiration date. For several years, Southwest used a "placeholder" expiration date of December 31, 2040, in their computer systems while they updated their backend technology; by 2026, most users simply see "No Expiration" in their account. This applies to "Wanna Get Away" and "Wanna Get Away Plus" fares. However, there is a technicality for "Transferable Flight Credits": while the credit itself doesn't expire for the original owner, if it is transferred to another Rapid Rewards member, the recipient must typically use it within 12 months of the date the original ticket was booked. It is also important to note that if a credit had already expired before July 28, 2022, it was not "resurrected" and remains lost. For most travelers, this means any credit sitting in their bank today is yours to keep indefinitely.