Delta Air Lines has four official elite status tiers, with its highest being Diamond Medallion.

You may not know there's an invitation-only membership tier called Delta 360°. It's reserved for Delta's biggest spenders and most influential travelers.

Other airlines have similar programs, such as United Airlines' Global Services and American Airlines' ConciergeKey. The privileged few in these tiers get access to the most luxe benefits, but the qualifications to become a member are pretty secretive.

If you've wondered what Delta 360° members get to enjoy, here are the details.

What is Delta 360°?

Delta 360° is the airline's highest elite status tier. It is invitation-only, resets annually, and only for the most loyal SkyMiles members.

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Delta 360° Club perks

For starters, you're at the top of the Delta Medallion food chain, which can be useful concerning priority help during short connections or flight irregularities.

Most Delta 360° membership benefits are available on the days you travel.

Executive membership to Delta Sky Club

While Delta is working to open dedicated Delta One business class lounges, it only operates Delta Sky Clubs for now. Delta 360° members receive an executive membership to Delta Sky Club, valued at $1,495 or 149,500 SkyMiles.

Executive membership gives someone access to a Delta Sky Club within three hours of a departure flight (or any time if making a connection) for a member and up to two guests.