Delta Cancellation Policy || Call +1-855-804-2283 For $0 Cancellation Charge 

As per the Delta 24 Hour Cancellation, passengers can cancel a flight booked on Delta Airlines within 24 hours of the acquisition. The airline will provide an entire refund of the ticket fare just in case the reservation was made every week or more before the scheduled date of the flight.
https://airlinescancellationpolicy.com/delta-airlines-flight-cancellation-policy/