My first time flying by myself was in December of 1982, LAX to GEG (Spokane, WA) for a recruiting trip to Washington State University. I don't remember too much of the flight, or what airline I was on, but I do remember going home I flew GEG - SEA - LAX and getting lost in the SEA terminal. I made my flight, though.
My first time flying without my parents was when I was in the 6th grade and the entire class sold candy to take at trip on PSA, LAX -SAN, to go to Sea World. That was a fun trip.