If ever I was traveling from Los Angeles to Atlanta, I would choose a direct flight with no layovers. I want the most efficient route to my destination. Point A to Point B. Take off, land. Assuming no difference in ticket price and all things being equal, if another LAX to ATL itinerary included a stop in, say, Chicago, would there be any reason to take it? Why pass through another airport in another city when I can fly direct?