FlyerTalk Forums - View Single Post - Delta Upgrade Certificate Availability Confusion (KLM Operated)
Old Nov 9, 2016, 8:38 pm
  #7  
TTT
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Originally Posted by javabytes
So if you book Delta-marketed flights, you can book any fare class except E, and upgrade into KLM Z class. If you book KLM marketed tickets, you need Y/B/M.
That's really good to know. I have been given the answer the OP got and took it for what it was without pushing it. Would be interested to hear how one goes about convincing a DL agent to push for KL Z space on a DL coded. Specifically, what was said and to whom.
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