The airline also has the option to purchase an extra 30 of the Max planes, due to be delivered into service between 2025 and 2028.

The new planes will result in a slight increase in Norwegian’s current fleet, offset by retiring existing aircraft.

Norwegian says the new Boeing planes are around 14% more fuel-efficient compared to the previous-generation aircraft, helping to put the company on course to achieve its target of reducing carbon emissions by 45% by 2030.

Boeing’s redesigned Max aircraft returned to service around 18 months ago after originally being grounded for a record 20 months following two fatal air crashes.

Norwegian will directly own a significant share of the new aircraft, resulting in greater financial stability for the company.

“The overall terms achieved are attractive for Norwegian, and the deal fits well with our long-term fleet strategy and route programme,” said Norwegian’s chief executive Geir Karlsen.

“It will enable us to serve our customers with modern, fuel-efficient aircraft with the latest technology, significantly reducing our carbon footprint. The deal will also strengthen the company’s equity considerably, further solidifying Norwegian’s financial position.”