Originally Posted by
nini_su
Regarding rebooking, I take your answer as a "this also doesn't change when getting a Plusgrade upgrade". So since the ticket is in Youth Go Smart, it'd incur a rebooking fee and yeah, I didn't even think about the fare difference.
The rebooking fee depends on the ticket your purchased. The plusgrade upgrade will only give you fast track and lounge access, a better seat/service onboard the flight and more EB points. From a plusgrade point of view, each leg is an individual trip, so you need to do the plusgrade bid for each leg on the trip HKG-MMX, but you can also just do it for 1 leg if you prefer that.