FlyerTalk Forums - View Single Post - Delta Simplifies Clearance Priority for Comp Upgrades
Old Apr 29, 2016 | 8:49 pm
  #15  
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Join Date: May 2015
Posts: 2,881
Originally Posted by Beckles
That has all existed for years, it is nothing new. I'm not sure they very explicitly document the fare class hierarchy, but it is published on the website indirectly on the reservation search functionality where you can select a minimum fare class.
http://www.delta.com/components/help/apps/booking/fare_class.jsp

Found it with Google, Delta fare class.
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