Through May 31, Hilton family stays of two or more nights earn 1,000 Delta Medallion Qualifying Miles and 1000 bonus Skymiles. Registration required.
Between the personal and small business co-branded American Express cards which offer alite qualifying miles along with Hilton stays, it’s possible to become a Platinum elite without ever setting foot on a Delta plane (but that’s probably overkill). Such folks don’t even need the double elite qualifying miles for flights offer…