Originally Posted by
rjque
I've never heard "Terminal I" before - perhaps it's a DL thing? I have only ever heard "International Terminal" or "Terminal 1." And "Terminal A" and "Terminal G" are frequently used designators here on Flyertalk.
Pedantically speaking, it's one terminal, the International Terminal, with two concourses, International Terminal-Concourse A and International Terminal-Concourse G.