Some airlines have fares that are refundable with a fee. Refundable does not necessarily mean fully refundable without penalty. However, while I haven't seen such fares offered by DL, AFAIK they could appear if the ticket/PNR includes segments marketed by other carriers but not segments operated by other carriers but marketed by DL (codeshares). If refundability matters (versus getting a DL credit for the full amount paid if the trip is cancelled), be sure to check the box and *also* inspect the fare rules. You may want to print the screen showing that you checked the bas at the beginning not the search too. If you don't have EF, it's wise to capture there fare rules during the purchase process as you won't be able to see them later on delta.dumb unless you can manage a dummy booking of exactly the same fare and the fare rules haven't changed in the meantime.