Originally Posted by
trmoncrief
But do the upgrade prices decrease when their is a sale?
Of course, you pay the fare difference, so if there is a PE sale and the PE fares drop the fare difference you'd have to pay would also drop.
If you pay $1000 for your economy ticket, and PE is $1500, you would pay the fare difference of $500 to up-fare to PE. If AA has a sale or the PE fares drop to $1250, then you would only pay the fare difference of $250 to up-fare to PE.