Originally Posted by
ijgordon
I'm pretty sure there is a MCT for each of (1) domestic-domestic, (2) domestic-international, and (3) international-domestic. Not that they're easy to find... But think about an airport like ATL with 5 (or is it 6?) terminals. There's no way to know at booking which terminal each flight will arrive/depart from, so I don't think there would generally be a terminal-specific MCT.
Those are the basic ones, but an airline can add more if they choose to at a particular airport. At IAH CO does have a different MCT for some CoEx flights, IIRC. I believe it basically takes into account the delay that customers would experience because of the buses to the terminal on arrival or something like that.