Originally Posted by
realjd
Will not work in this case for multiple reasons, first of which is that the OP is not booking all in DL coded flights.
I strongly advise AGAINST ever trying a BFG claim, as Delta is notorious for denying them. Their guiding principle is that it's not their fault their IT sucks, if it was remotely possible to book on DL.dumb, you're not getting a refund.