Originally Posted by
transportprof
It sounds to me like the main delay was at YUL, not IST. Thus the relevant MCT is International to USA @ YUL. That's what may or may not have been legal.
Possibly, I wasn't really sure what the TK ticketing agent was rambling on about, but she was furious on the phone with UA. I also am pretty sure I would've missed my connection flight even if I had those 45 minutes. That customs line was beyond 1 hr + wait.