For tickets purchased on or before April 30, 2021, change fees have been relinquished, and for the Main cabin or above tickets flying from North America, purchased on or after May 1, 2021, there are no change fees. And for Delta Airlines tickets flying outside of North America, there are no change and cancellation charges. If the cost of the changed flight price is more than the previous flight price, the difference is to be paid by the customers, whereas if the new flight price is less than the earlier one, then you will be issued eCredit. Lastly, the basic economy ticket can be changed, but you can cancel it by incurring a nominal charge.