I reached out to DL regarding the benefits and lounge access is not included. (DL on LY and LY on DL)
(https://www.delta.com/us/en/skymiles/medallion-program/international-partner-skyteam-benefits
LY is not on the list of partners
Plus, look forward to elite benefits coming for both SkyMiles and Matmid Members beginning January 15, 2024. https://www.delta.com/us/en/skymiles/how-to-earn-miles/airline-partners No updates on delta.com yet)
For Platinum Medallion members, this is the agreed by Delta for tier benefits for El Al Matmid members.
Seat Selection - YES
Preferred Seat Access - YES
Priority Check-In - YES
Elite Baggage Allowance - YES, except Lite/Basic Economy (2x23kg)
Priority Baggage Handling - YES
Priority Boarding - YES, Sky Priority
Priority Security Line Access - YES
Lounge Access - NO
Other information is the agreed by El Al for tier benefits for Delta SkyMiles Members:
Seat Selection - YES, except for Delta Basic or El Al Lite tickets
Preferred Seat Access - Except for Lite/Basic Space Seats-at the time of reservation
Priority Check-In - YES
Elite Baggage Allowance - Not for Lite/Basic Economy / YES (2x23kg)
Priority Baggage Handling - YES
Priority Boarding - YES
Priority Security Line Access - Pre-check in security from BGN and other stations, (airport security only available to Business passengers.)
Lounge Access - NO