Jet Airways JetPrivilege program members received information on December 15, 2016, about a frequent flier partnership with Delta Air Lines that begun the very same day.
JetPrivilege members can now earn and use their JPmiles on flights operated by Delta and earn elite qualifying miles on Delta flights that are marketed by Jet Airways (codeshares).
You can access Jet Airways web page for this partnership here.
Here’s the earning JPmiles chart based on Delta fare class:
You can redeem JPmiles on Delta miles based on their all partner award chart that you can access here.
I tried to find information fro Delta’s website about frequent flier partnership but none was available. Usually these go live with both airlines at the same time. This would lead me to believe that this should have started by now for SkyMiles members as well.