I tried DL for a SDF-MSP r/t with about 4 days notice. They were $978. I got the same trip through a WN/ATA code-share for $420. NO brainer!!! I have always chosen DL over WN for $50 bucks or so, but not over $500. Delta is going to be in bigger trouble now that WN is code-sharing flights to more locations. I will gladly give up my FC seat, or worse any seat on a RJ for a WN Y seat for such a major difference in cost.