Alaska is the most fuel-efficient airline for 7th year, also lands on Dow Jones Sustainability Index Alaska Airlines ranks No. 1 in fuel efficiency for U.S. airlines for the 7th consecutive year. Alaska led all 13 major U.S. carriers as the most fuel-efficient airline operating in the United States in 2015 and 2016, according to a report released today by the International Council on Clean Transportation, an independent, nonprofit research organization… 1 min read December 14, 2017 Keep up with Alaska