Delta Air Lines Inc. (NYSE: DAL) “sits as king of the profit hill” among the big three U.S. airlines, Bloomberg reports in a Friday story, a day after the airline reported it earned $1.2 billion in the second quarter of 2017.

The July 14 Bloomberg story notes that Delta’s profit margins are better than American or United airlines’, in an industry where the airlines pay about the same thing for everything. “So what’s the secret sauce in Atlanta?,” Bloomberg asks. To find out read the full story…