Originally Posted by
warakorn
No!
If the OP booked a real through-ticket, EC261/2004 apples and BA is liable for duty of care, because BA is the carrier who departed from an EU airport. There was a recent EJC court ruling on that.
Only if was a codeshare though and sundry other conditions. Expedia isn't where I would want to start here, however their interface easily shows connections which in many cases can be done via BA but only with a telephone call.
By the way it really helps if you include the top line of the quoted person rather than editing them out. That way a little blue box appears next to the quoted person and then you can click that to see the context.