Originally Posted by
Knusper
When I book a "price optimized" intinerary with the online tool, e.g. by using favourable code shares, and I later change the carrier/date of a flight which would have been more expensive when booked in the first place, do I have to pay the difference or is the price I paid for my ONE itinerarity a done deal?
My recollection is that when I've tried this I was asked to pay the extra "taxes" if it was a voluntary change, but not if it was involuntary (e.g., schedule change or carrier dropped service or changed days of operation).