American consumers routinely choose lower-priced tickets over those on more-comfortable airlines. And when ticket prices go down, Americans fly more.
The real price of a ticket has fallen consistently since at least the 1980s [1]. Full-fare (i.e. first-class refundable) ticket prices today remain around where any ticket price was a few decades ago.
[1] https://www.washingtonpost.com/blogs/ezra-klein/files/2012/1...