Originally Posted by
MSP2SEA
I would correct this thread slightly: It's not specifically a Skyteam benefit, but you WOULD be upgraded as a result of the DL/AM cooperation agreement IF your ticket is on a codeshare flight AND your ticket is coded as a Delta ticket (006).
It doesn't come up often... but when you have a ticket like this you will be upgraded automatically and one day in advance. I have been upgraded on ORD-MEX and GDL-LAX in this manner.
You also will have access to their lounge in MEX as ST Elite+ with international ticket. And contrary to other comments in this thread, there is preferential boarding and it is honored in MEX.
I confirm this statement. I was recently on the upgrade list with a DL codeshare on AM metal (not upgraded finally as 1st class was full). Priority boarding and preferential check-in honored in both MEX and CUN.
However, boarding in MEX was somewhat of a zoo as they boarded 2 flights through the same door at the same time and pax had to take left or right after the controls to enter the correct plane.