Not so old, but still missed: Midway.
I definitely remember Eastern. They started flying again a few years after they went under, with $6 flights from Boston-New York and New York-Washington one weekend. No advance purchase available. I got to Logan at 6 AM, and boarded a flight at 1 PM!!! Spent about two hours in New York, made it back to JFK, and got on the last flight back to Boston.
Braniff is another one that started up again, and (naturally) I was compelled to take advantage of their low introductory fare. No, I never do learn. Flight was delayed several hours, supposed to connect in New York, they promised the connecting flights would wait. Nope. Those of us heading for Tampa (Orlando? It's been a while) were placed on a Continental flight - best leg of the trip! After we were bused to Newark, of course. On the return flight, again changing planes in New York, surprise! Flight delays. Weather. Snowing in Boston. Funny, when I called home, they didn't know anything about snow

:. Anyway, the plane didn't have overhead bins, just shelves - so everyone had to gate-check carry-ons. They promised our luggage would get to Boston on our flight.
That was my first experience with misdirected luggage.