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Old Mar 23, 2023, 2:45 pm
  #6  
JALPak
Ambassador: Japan Airlines
 
Join Date: Mar 2008
Location: LAX
Programs: JAL Mileage Bank, JMB Diamond, oneworld Emerald, Bonvoy Platinum
Posts: 16,400
Originally Posted by RDUflyer2
Thanks JalPak. Very helpful. I also appreciate your experience with changes.

Is there a limited inventory on the upgrades or can one book as long as there are F seats available?
If limited, do they release more closer to departure?

Thanks in advance for your information.
Upgrade inventory is managed separately and is different from revenue tickets. There’s no guarantee they will release more closer to departure because FLY ON members have waitlist priority over regular members. And they definitely won’t release upgrade award when cabin is full.
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