2. Air travel growth outpaces efficiency gains
Amy reports ... U.S.-based airlines are getting more fuel efficient, but Americans are traveling more and erasing potential gains, according to a study out Thursday.
By the numbers: Fuel efficiency of airplanes increased by 3% between 2016 and 2018, but the miles passengers have traveled increased 10%.
- Thus, fuel use and carbon dioxide emissions rose by 7%, per the nonprofit International Council on Clean Transportation (ICCT).
Why it matters: Jet-fueled, commercial airplanes account for just 2% of global carbon dioxide emissions, but ICCT says it is set to triple by 2050 as people and goods fly more around the world.
What’s new: Budget airline Frontier took the top spot for the second year in a row as the most fuel efficient U.S. airline. Two other airlines that are considered similarly affordable — Spirit and Southwest — came in tied for second.
- Those flights are less expensive because they squeeze a lot of passengers onto their planes, which also increases the efficiency.
One level deeper: The chart above shows the relative efficiency of each airline. For context, the least efficient airline (JetBlue) burns 26% more fuel than Frontier.
- Those are averages, which may mask some of the bigger differences between the airlines, according to ICCT aviation and marine program director Dan Rutherford.
- Fuel efficiency varies widely — 20% to 85% difference in carbon intensity — on specific routes depending on several factors, including layovers and aircraft flown.