To Answer Skyhawks queastion the drinking age in Canada is either 18 or 19 depending on the province. Good question AC_340 I have been wondering the same thing. I guess I will be drinking on the AC flight as soon as I board in Washington.
In the 1970s I regularly flew between college and home. In those days I was rarely asked for ID and had no problem being served alcohol. Maybe all that facial hair and a smoke in hand helped a bit on that score.
I'd like to see a state try to enforce it's drinking age on an airplane flying a few thousand feet above it! Who's jurisdiction would that fall under? The state where the airplane is owned? is flying over?