Originally Posted by
MSPeconomist
It sounds like EU261 downgrade compensation rules might apply, although this could depend on whether the paid upgrade at check in resulted in a reissued ticket in business class or just a business class boarding pass.
uh? if the passenger originally had a ticket in premium economy and was placed by the airline in a lower class, then (s)he is entitled to downgrade compensation, whether they re-issue the ticket or not.
I am still unclear as to what segments exactly the OP travelled in. Secondly, the OP speaks of KLM but still mentions YYZ-CDG-DEL, which would not involve a KLM flight.
If I get it right, the OP originally booked YYZ-CDG-DEL with AF in PE. At check-in, he got an upgrade for money offer on CDG-DEL in business, which he took up.
Thus, prior to the downgrade, the OP had a ticket for YYZ-CDG-DEL, with the first leg in PE and the second leg in C.
Question to the OP: which itinerary did you actually fly and in which class on each leg?