Via the MilesLink newsletter, you can earn Delta elite qualifying miles for Hilton stays of 2 nights or more (registration required) between September 1 and December 10.
Naturally, you have to select Delta Skymiles as your ‘double dip’ earning partner.
If your Hilton HHonors earning selection is ‘Variable Miles’ you will earn 1 bonus mile and 1 Medallion Qualifying Miles per dollar spent.
If your Hilton HHonors earning selection is ‘Fixed Miles’ you were earn 500 bonus miles and 500 Medallion Qualifying Miles per stay.
You can earn up to 10,000 qualifying miles through this promotion.