Air Canada, Air Tran, Jet Blue, Sun Wing, Thomson and West Jet all arrive and depart from the National Terminal, aka Terminal 2. Just a little FYI. You would hate to have to hoof it .8 mile to the correct terminal, or wait for a crowded shuttle, especially if you are running short on time. This would be most applicable if you take a cab FROM your hotel TO the airport.
Plus, you wll waste 30 pesos for parking in the wrong lot. I found out about Air Tran the hard way last Sunday.