Yes, you can make use of Delta's cancelation policy if you have a ticket with Delta, then you can make use of the cancelation policy that is prepared by Delta, and that policy is also explained later on so you can understand the criteria for cancelation and if you are eligible or not if you make use of this policy.
Source : https://www.travomart.co.uk/blog/does-delta-have-a-24-hour-cancellation-policy
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