Originally Posted by
WineCountryUA
It depends on the type of paid upgrade. If booked in R/PN/ZN then no, if booked into P/A/Z then yes.
The first is an upgrade fee (and you will SDC into your original purchased fare class) and the second was an upfare that sticks.
The reservation I'm discussing booked into P class. Again, it was an upgrade offered when I purchased the ticket. When I hit the "purchase" button the offer popped up and allowed me to upgrade to First Class for $xxx. I agreed to pay the money and the result was P class. Even when I've accepted upgrades at check-in it books into P class. In what circumstances would it book into PN or ZN? I understand R is for instrument/mileage upgrades.