Delta is taking things up a notch.  In response to American’s offer, Delta is offering up to triple Medallion Qualification Miles (MQM’s) for flights through June 15th.  Of course, there’s a catch.  You can only earn triple MQM’s on the most expensive fares.  H, Q and K fares earn double MQM’s, while L, U and T fares only earn actual miles flown.

Register for this offer here.  The eligible fare codes and their respective earning possibilities are listed on the same page.

Delta’s press release can be viewed here.