Well, not quite. But listen to any user experience expert or online travel workflow designer and they will usually say the following: "Keep it simple and intuitive."
But while booking travel products is certainly more complex than buying a loaf of bread at a supermarket (or, indeed, online), this clip from Google Analytics demonstrates the frustrations many users must go through with online checkouts in general, especially when the guidance is less than helpful.
It's rather funny as well...