Originally Posted by
KO2546
This is correct but only if a date change requires an "reissue", and if you look at most CX/KA ticket these days, that's exactly what is often included in the ticket rules

Originally Posted by
justforfun
That doesn't seem right. If you're on a fully-flexible ticket, when you change flights as long as the fare bucket is available the change is made without re-faring.
The notion of "fully flexible" is getting fuzzy nowadays. Most "flexible" tickets have a no-penalty clause, meaning that there is no fee for changing the flight/date. But most airlines have added a clause that the fare must be recalculated. Here is a typical wording "THE ITINERARY MUST BE RECALCULATED USING CURRENT FARES IN EFFECT ON THE DATE THE TICKET IS PRESENTED FOR REISSUE AND MUST MEET ALL RULE PROVISIONS OF THE REVISED FARE USED". Maybe be it does not apply to full fare IATA (but who is paying full fare IATA?). But as soon as you get some flexible, less expensive ticket (e.g. A, C, D), it does. I can assure you that I was issued a F class ticket HKG-JFK return at a steep price and fully refundable/changeable, but still had to pay some 15% hike because of changing the return date.