If you have a platinum Amex or have reached Diamond status and used one of your choice benefits to select club access.
If you have an Amex platinum card AND are flying Delta
You must have a membership or one of the participating cards.
If you have an AMEX Platinum, yes. If not I think it's $40.
If you have one of the top AMEX cards such as platinum or are Diamond status level medallion.
There are things that get you complementary Sky Club access as a perk, but it's not just a free-to-everyone lounge.
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