Airline stocks are enjoying tailwinds today, after JetBlue Airways (JBLU) hiked its revenue outlook for the fiscal third quarter due to strong summer travel. Below, let's check in with American Airlines Group Inc (NASDAQ:AAL), Delta Air Lines, Inc. (NYSE:DAL), and  United Airlines Holdings Inc (NASDAQ:UAL) to see how they are faring.Last seen up 2.9% to trade at $10.94, AAL is bouncing back from an Aug. 5, four-year low of $9.07. The $11.50 level has acted as resistance since June, but shares are eyeing the ...