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The most (and least) fuel-efficient U.S. airlines

Fueling manager Jarid Svraka looks on as he fuels an Alaska Airlines Boeing 737-800 jet with a new, blended alternative jet fuel.
Fueling manager Jarid Svraka looks on as he fuels an Alaska Airlines Boeing 737-800 jet. Photo: Elaine Thompson / AP

For the seventh year in a row, Alaska Airlines was the most fuel-efficient airline among U.S. carriers, according to a study from the International Council on Clean Transportation (ICCT).

Why it matters: Naya Olmer, the study's author, said Alaska Airlines "burns about 13% less fuel than the industry average, it's a profitable airline, and it's done this for seven years running...So, it's possible." The report also notes that aviation accounts for around 2.5% of global CO2 emissions, and U.S. carriers make up 30% of that.