Delta Airlines says it will extend flight credits, on customer accounts, from 2022 expirations out to end of 2023, for use with travel booked through end of 2024.
Delta Air Lines Flight Credits Now Valid Through 2023 for travel out through 2024

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Delta Airlines says it will extend flight credits, on customer accounts, from 2022 expirations out to end of 2023, for use with travel booked through end of 2024.