Originally Posted by
stevendorechester
Award tickets are considered paid tickets. You are getting a specific class of service in exchange for specific I know in Europe this is specifically addressed in the law but under common law if you are offered one product for one price and another for a more expensive price and you choose the more expensive one and the seller does not deliver but give you the lower priced product you have a claim against the difference in price. Depending on the jurisdiction the courts may interpret it differently, especially in this case as Delta sold one product and chose to replace it with another as a business decision.
This flight originates from the US by a US-domiciled carrier. EU law has no bearing.