Airline stocks have had a rough go of it in the earnings confessional this monthAirline stocks are always in focus as summer travel season picks up, even more so with earnings season in high gear. With this volatility in mind, how are some of the heavy hitters faring after their turn in the quarterly confessional?Delta Air Lines, Inc. (NYSE:DAL) stock is down 2.2% to trade at $44.80 at last glance, and has now shaved 16.8% off its May 13 three-year high of $53.86. The shares dropped 4% on July 11 after the ...