Booking mixed-cabin on partner airline, and business space becomes available
If I use Aeroplan points to buy an Eva Air flight, paying Business level miles
Seattle - TPE in Business, TPE - DPS in Economy.
And tomorrow TPE - DPS becomes available in business class. Can I call in and upgrade myself, and if yes will I incur the $90 change fee?
I saw some other threads around similar issue but they discussed AirCanada and waitlisting, which might be different.