Originally Posted by
Adam Smith
These two sentences are contradictory. The former doesn't really make sense, given this clearly involves AC metal and is therefore priced dynamically - zone and distance don't really matter, because AC charges whatever it wants to charge. But yes, changing this booking to be in J would trigger re-pricing, which might be terrible, or it might not.
Or you might just be able to call-in and have the seating changed as a result of the equipment change, explaining that you booked a Business Class that from A to B to C that didn't have a Business Class cabin initially from A to B. I have done it successfully before with no fee or re-pricing of the ticket...definitely worth a try!