Gadz, I always use ITA to search for DL fares, then after I find what I want, then I go over to DL's site and book it. ITA often comes up with interesting, and less expensive options that require sometimes strange routings. I really don't want to lose that. (e.g. last year STL-CVG-LAS-HNL was WAY cheaper than the more direct options via a hub. I have some other examples as well, but will not share them here lest DL get ideas.)