Originally Posted by Hollandair

I have an interesting case of which I am curious what my rights are because the situation is not described anywhere:

Trip is GOT-CDG-SEA-LAS on all on same day,

GOT-CDG 06:50 - 09:10 Operated ON TIME ( Flown)
CDG-SEA 10:15- 11:15 Operated with a delay of approx 1 hour (Flown)
SEA-LAS 3.33PM - 5.58PM Operated on time ( Involuntarily Denied Boarding, due to system error)
eventually rebooked to SEA-LAS 7.40 PM - 10.05 PM which operated ON TIME and that i flew.

So i arrive at SEA from CDG with a delay at 12.25 PM. My next flight was scheduled at 3.33PM and was on time which gave me a connection time of over 3 hours.
However my KLM and my DL app informs me that my SEA-LAS flight is disrupted (which was not the case) and that I was rebooked to a flight that departed the day before!!! ( thats why conclusion is system error)

At the Delta check in at SEA they said they could not do anything and that I have to contact KLM. So I contacted KLM, to rebook me on the 3.33 PM flight. They could not do it because this flight was now sold out. I was rebooked on a SEA-LAS flight departing 7.40
and arrived 10.05 PM.

So I arrived over 4 hours later at my destination, because of a system error at KLM/DL which threw me off the flight and unable to rebook because sold out.

I filed for EU261 with KLM. This was denied because the SEA-LAS flight is not originating in EU and not operated by EU Airline.
On the DOT-website I read that you are entitled to 400% of one way fare compensation ( how is this calculated) if your IDB is not because of aircraft change, weight and balance, or downgrading and if you were holding a valid reservation and showed up at check-in (and gate) on time.

What would be my best move? should I claim with DL or KLM for bumping me of the fligth referring to the compesation rules as described by DOT? For me it is impossible to check if KL or DL system bumped me. Shoudl I claim at DL because flight was operated by DL, or at KLM because it was their ticket?

Thanks for your thoughts