Originally Posted by
mtkeller
I had a severe schedule change to a DL itinerary I booked through Orbitz, and once the ticket had been reissued after the schedule change, DL had control over the ticket and everything went through them. At one stage, I called Orbitz unaware that DL had control of the ticket and was told I would need to call DL.
You are correct that this is not universal practice but it is nonetheless very common, and probably close to universal outside North America. With Orbitz, I have sometimes had them have tripartite phone calls with the airline as the third party and sometimes the airline has offered to take the ticket over and Orbitz accepted.