Most fuel efficient U.S. airline 2010-2017

The International Council on Clean Transportation, an independent, nonprofit research organization, has ranked Alaska Airlines No. 1 in fuel efficiency among all 13 major U.S. airlines for seven consecutive years. Alaska led all 13 major U.S. carriers as the most fuel-efficient airline operating in the United States for the past five consecutive years, outperforming the least fuel-efficient carrier by 25 percent.