Does Delta give you a full refund?
Delta provides full refunds if +1-801-804-8011 your flight is canceled by the airline or if you cancel within the 24-hour +1-801-804-8011 risk-free cancellation period. For other scenarios, a full refund is usually only available for +1-801-804-8011 refundable tickets; otherwise, you may receive eCredits instead.
https://discussions.trendmicro.com/en-us/forums/pc-security/1362f31a-d299-ef11-95f5-6045bd52ae83