We booked to fly to Abu Dhabi in April on the basis of the COVID policy that we could either get a credit or change our flight if COVID prevented us travelling. There was no mention on the website that we would need to pay the fare difference (within the same class of travel) and when we tried to rebook we were told there were no available options for the entire month of October and we would need to pay a GBP12k fare difference. Obviously if they had been more upfront at the outset we would never have booked. Very disappointing way for an airline to behave - they could easily have accommodated us on the replacement flights and refusing to give a refund and offer an Etihad credit instead is pointless if we cant buy a flight with the credit. Unhelpful and dishonest. Contrast with easyjet and BA who (although reluctantly) both honored their commitments to refund. Shame on Etihad.