US-based Air Lease (ALC) is to purchase up to 78 Boeing aircraft in a deal valued at $9.6bn at current list prices.

The deal includes a firm order for 20 737 MAX 8 aircraft and three 787-9 Dreamliner planes, as well as commitment for 55 737 MAX aeroplanes.

The deal has brought the total number of orders and commitments placed by ALC for Boeing aircraft since 2010 to 361 aircraft that feature 288 737s, 21 777s, and 52 787 Dreamliners.

Boeing Commercial Airplanes president and CEO Kevin McAllister said: “This new order by one of the world’s leading lessors demonstrates the market-leadership of the 737 MAX and 787 Dreamliner.

“The combination of operational efficiency and unmatched passenger comfort underlines the advantages of the 737 MAX and 787.”

“Boeing’s 787 Dreamliner aircraft are designed to consume 20% less fuel than the aeroplanes it is replacing.”

Boeing’s 737 MAX aircraft family is designed to provide improved performance, including lower operating costs and additional range to open up new destinations, to its customers.

The single-aisle aircraft family features CFM International LEAP-1B engines, Advanced Technology winglets, Boeing Sky Interior, and large flight deck displays.

Boeing’s 787 Dreamliner aircraft are designed to consume 20% less fuel than the aeroplanes it is replacing.

The company has so far received around 1,400 orders for the twin-aisle Dreamliner aircraft from more than 70 customers worldwide.

In a separate development, Boeing secured an order worth $2.3bn from Ireland-based aircraft lessor Goshawk Aviation to provide 20 737 MAX aircraft.