I still enjoyed the People's Express flight I once tookd from LAX-BOS. On the giant plane (which cost nothin') they asked if anybody onboard wished to carry onto London for only $100. Show yoru passport to the flight attendant (stewardess in those days) and give her $100 cash and you are off once the plane connects thru Boston.
I didn't go but should have because the hottie sitting next to me was British and very friendly.
No miles that trip, but those were the days indeed!
better other perks such as those fun red-eye flights you read about even today!

MM