The biggest thing I remember about flying in the 70's was how polite everyone was. Of course, in relative dollars, a plane ticket was very expensive.
I was a college student then, but would NEVER have dreamed of flying in jeans and a T-shirt ( it just wasnt done) and yet here i am as a grown up flying FC in jeans.
Flying was considered an "experience", the stewardesses ( sorry but that is what they were called) were there to serve and it was a different world