Boeing and leasing company Avolon have finalized an order for six 787-9 Dreamliners and five additional 737 MAX 9s, valued at more than $2.1 billion at list prices.

Avolon announced a commitment to purchase the airplanes during the 2014 Farnborough Airshow in July.

This marks Avolon’s first order for the super-efficient 787 Dreamliner and will increase the lessor’s 737 MAX portfolio to 20 airplanes.

“We’re excited that Avolon has shown confidence in both the 787 and 737 MAX,” said Boeing Commercial Airplanes president and CEO Ray Conner. “It’s clear the leasing market sees the value of these airplanes, and we’re proud to provide them through our partnership with Avolon.”

The 737 MAX has surpassed 2,200 orders from 47 customers worldwide. The largest in the 737 MAX family, the 737 MAX 9 offers the best fuel-efficiency per seat and will be 7 percent per trip less expensive to operate than its competitor, the A321neo. The 737 MAX 9 provides versatile growth capacity for airlines needing larger single-aisle options in their fleet.

The 787-9 complements and extends the 787 family. With the fuselage stretched by 20 feet (6 m) over the 787-8, the 787-9 can fly more passengers and cargo farther with the same exceptional environmental performance: 20 percent less fuel use and 20 percent fewer emissions than similarly sized airplanes, as well as passenger-pleasing features.