Despite the ongoing tariff-related woes, prospects of the Zacks Transportation - Airline industry have taken a turn for the better with air-travel demand stabilizing. The decline in fuel costs also represents a positive for the industry players, as fuel expenses represent a key input cost for airlines. The shareholder-friendly approach of airlines also bodes well.As a result, we believe that investors interested in the industry would do well to monitor stocks like Delta Air Lines (DAL) , Ryanair Holdings (R ...