Originally Posted by
BigFlyer
Suing in the EU might not be practical.
If things don't work out, the OP should sue Expedia, Delta, and KLM in the US and le the court sort out who, if anyone, is responsible.
The ticket was issued by Expedia in the US so suing here should be fine. At a minimum there is a breach of contract, and you can also make the pitch for EU261 - although I believe there is a federal case that says you can't sue in a US court for EU261 damages.
There is better than a 50/50 chance that if you sue the three of them in small claims court the case will settle before the trial.
Not how court works. You have to allege which party is responsible and why. You dont get to say I feel I was wronged, determine who wronged me and how they wronged me. You goto court when you and the party you're suing disagree on what you're alleging.