Early 70's - I was 15, went AA from BUF to ORD, Blue Line to Downtown (before the cool Blue Line Station was built at ORD - there was a bus ride involved). Greyhound to ATW. Too young to be scared, thought it was a great adventure.
About all I remember was getting on the plane after being told to sit anywhere, and tried to sit in first class, was nicely told to go to the back. Oh yeah - almost had a heart attack when the bus at ORD didn't show up to take me to the blue line (was it even called the blue line then?). Turns out I didn't change my watch from EDT to CDT.
Not sure Mrs. GopherPuckGuy would allow our kids to do the same route when they were 15.