FlyerTalk Forums - View Single Post - How to use systemwide upgrades while booking?
Old Jan 20, 2011 | 12:13 pm
  #4  
sbm12
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Originally Posted by TXHolmes
Book your ticket on flights that show reward F Availability, then log into the reservation and you should be able to upgrade using your SWU.
You need upgrade award inventory (R), not award seat inventory (I/O), to be available for the SWU to work.
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