Originally Posted by
danger
Just to be clear, are you saying that a change prior to departure of the first flight only incurs the USD100 change fee, not re-pricing (the issue of fare bucket availability aside)?
For the A fare I booked, the wording is exceedingly clear that this is the case (if routing isn't changed); however, I haven't tried and in practice it may be impossible on the long haul leg as it seems they have married Vietnam-HKG-US segments to keep A=0.