In the '60s, this is what they thought things at Braniff would be like by 1975.
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Of course, it wasn't quite like that, but right up until deregulation and fare-based competition took hold, it was a classy experience. My late grandfather never flew without a suit and tie, because people of that era felt that flying was something you dressed for, like a business meeting or going out to dinner.
Here's what TWA was offering in the way of differentiation on its transcon services in the mid '70s, brought to you by Mr. Peter Sellars:
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and
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International-quality service on domestic flights! Today there's no way they could provide some of these things with the current price structure.