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Thread: Y/B/M Premier Instant Upgrade - How does it work? [ended 21 Aug 2025]
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Old Sep 22, 2024 | 6:28 pm
  #451  
leftysauce
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Originally Posted by kb1992
The ticket BOS-SFO-HKG/TPE-SFO-BOS in premium economy is issued. It shows B class between BOS and SFO, R class between SFO and HKG/TPE.

If I click "Fare Rules" when viewing the PNR, there are screenshots below







My question is: where do you look to figure out the underlying fare basis? i.e. true or fake B fare?
R- fare is not "fake" B fare. It is eligible for YBM instant upgrade

"Fake" B fare starts with lower class letter but books into B
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