DW and I had to change a flight we'd booked for our cruise and we were charged $150 per ticket. We were also charged $25 each cancellation fee. Since the price of the new tickets were less than our old ones the airlines gave us useless vouchers for the remaining balance of the old tickets totaling $82. The vouchers were only good for 3 months. Can you say "expired". Paid right through the nose. That's something we won't soon be doing again.