You can feel good about flying to Ireland with low-cost airline Norwegian - they're the most fuel-efficient airline crossing the Atlantic!

The International Council on Clean Transportation (ICCT) in September released its white paper analyzing the fuel efficiency of the 20 leading airlines on routes between the U.S. to Europe in 2017. Following rigorous scientific assessments, Norwegian once again rose to the top as the most fuel-efficient airline on transatlantic routes for a second time in history, also receiving this honor in 2015 when the ICCT released its first study.

Findings showed Norwegian, on average, achieved 44 passenger kilometers per liter (pax-km/L), which is 33% higher than the industry average - soaring past 19 of its competitors. As the World’s Best Low-Cost Long-Haul Airline for the fourth consecutive year, Norwegian, flies one of the youngest fleets in the world, comprised of Boeing 787 Dreamliners, 737-800s and 737-MAXes.

According to the study, Norwegian eclipsed its competition as the most-fuel efficient on sample routes from New York to London, Los Angeles to London and New York to Paris. In fact, on the New York to London route, Norwegian’s competition including Virgin Atlantic, American, Delta, United and British Airways burned 33% to 78% more fuel per passenger-km.

Overall, there is a dramatic gap of 63% between the fuel intensity of frontrunner Norwegian and bottom-ranked British Airways on transatlantic operations, a marked increase since the last assessment in 2014. Additionally, Norwegian has reduced its per passenger emissions by 30 percent since 2008, thanks to its investment in new aircraft.

“The most important thing an airline can do for the environment is to invest in new fleet of aircraft. Our strategy to have a modern fleet is paying dividends not only for our business and customers, but also our planet. This recognition from ICCT is truly the highest form of industry praise and is validation that we’re moving in the right direction with more environmentally friendly planes. For customers, this offers yet another reason to fly with us, to help reduce their carbon footprint.” said CEO Bjørn Kjos of Norwegian.

“One of the biggest changes in the transatlantic market between 2014 and 2017 was an increase in operations from European low-cost carriers and the further utilization of newer, fuel-efficient aircraft,” said ICCT’s Brandon Graver, lead author of the study.

The International Council on Clean Transportation is an independent nonprofit organization founded to provide first-rate, unbiased research and technical and scientific analysis to environmental regulators. Its mission is to improve the environmental performance and energy efficiency of road, marine, and air transportation, to benefit public health and mitigate climate change.

To download the entire white paper, visit theicct.org