Everybody goes back and forth on which airport is the busiest: ATL or ORD. In the end it depends on how you define busiest (number of passengers or number of take-offs/landings). But this is the mystery I don't get: Why is ATL so much more expensive to fly out of than ORD?
Take ATL-LAX vs. ORD-LAX. On average, I find that ATL is $100 more than ORD (which is about 33%). They are similar in distance (1940nm vs 1740nm). I would imagine they are similar on demand. I would further imagine they are similar in supply - with adequate competition (ATL = DL, FL - ORD = AA, UA). So what's the difference?