Related: Elite Status Matching Information!
You need to scan and send your elite membership card to qualify. The offer expires on March 31st, so there probably won’t be time for folks who signed up for the BMI status this time around to get their new cards. Of course if you signed up for the offer last year you’ll have no problems! You can get matched to bottom-tier Silver, Gold, or even top-tier Platinum. They will not match status from Skyteam Alliance partners.
One nice benefit that all Flying Blue elites get is 2 free 70 pound bags when traveling on Delta for themselves and for all of their travel companions.