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Thread: Question: Upgrading a ticket using someone else's miles?
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Old Aug 7, 2014 | 1:09 pm
  #3  
IluvSQ
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You can only upgrade using miles if you are in Y or B class ( highest economy class
fares). Then you can upgrade if and only if upgrade space is available.

You will usually be able to buy a restricted business class ticket for less than a Y/B fare.
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