Is eUpgrade based on segment or reservation?
Newbie question : say I fly from YVR - DFW, but route through YYZ, do I have to pay 10 credits for YVR-YYZ, then another 10 credits for YYZ-DFW?
How would it work if I upgrade to PE on 1 leg, and J for the other leg ( due to plane configuration there's no PE seat on the 2nd leg )?
Thanks