Originally Posted by
nycityny
Follow-up question. I know that a paid upgrade is not supposed to follow any voluntary changes to the itinerary. Does this include same-day changes to an earlier flight?
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.