The BoeingThe new Boeing 777X will be the world’s largest and most efficient twin-engine jet, unmatched in every aspect of performance. With new breakthroughs in aerodynamics and engines, the 777X will deliver 10 percent lower fuel use and emissions and 10 percent lower operating costs than the competition. A true family, the 777X offers low-risk, profitable growth, industry-leading reliability and seamless integration with the 777 and 787 Dreamliner families for even more flexibility. But performance is just part of the story. With a spacious, wide cabin, new custom architecture and innovations from the 787 Dreamliner, the 777X will deliver the flight experience of the future.

777X is the latest series of the long-range, wide-body, twin-engine Boeing 777 family from Boeing Commercial Airplanes. The 777X features new GE9X engines, new composite wings with folding wingtips, greater cabin width and seating capacity, and technologies from the Boeing 787. The 777X was launched in November 2013 with two variants: the 777-8 and the 777-9. The 777-8 provides seating for 384 passengers and has a range of 8,730 nmi (16,170 km) while the 777-9 has seating for 426 passengers and a range of over 7,285 nmi (13,500 km). The 777-9 first flew on January 25, 2020, with deliveries expected to commence in 2022

In December 2013, Hong Kong-based Cathay Pacific ordered 21 777-9 airliners with deliveries from 2021 to 2024.

In July 2014, Emirates, the launch customer, finalized its order for 150 777X aircraft, consisting of 115 777-9s and 35 777-8s.

On November 20, Emirates reduced its order total to 115 in exchange for ordering 30 Boeing 787-9s, while remaining the largest 777X customer.  

On July 16, Qatar Airways finalized its order for 50 777-9 aircraft, with purchase rights for 50 more 777-9s.

On July 31, Japan's All Nippon Airways finalized
an order for 20 Boeing 777-9s.

In February 2017, Singapore Airlines signed a letter of intent with Boeing for 20 777-9 and 19 787-10 airliners; this was firmed in June 2017.

In June 2017, the three Persian Gulf carriers (Emirates, Etihad Airways and Qatar Airways) held 235 orders, 69% of the 340 commitments, which are not as secure as they were.

After a nearly $2 billion loss in 2016, Etihad had to cut routes, shrink its fleet and is keen on canceling or deferring its orders, preferring to incur cancellations penalties rather than recurring losses from overcapacity.

On February 14, 2019, it was reported that Etihad would take only six of the 25 777X airliners it had originally ordered.

On November 7, Lufthansa stated it had converted 14 orders into options, leaving six firm commitments, after having negotiated a change as part of its order for 20 787s

On February 28, 2019, British Airways parent International Airlines Group ordered up to 42 777-9, 18 firm and 24 options, valued at up to $18.6 billion, to replace its Boeing 747-400.On November 7, Lufthansa stated it had converted 14 orders into options, leaving six firm commitments, after having negotiated a change as part of its order for 20 787s

In June 2017, the three Persian Gulf carriers (Emirates, Etihad Airways and Qatar Airways) held 235 orders, 69% of the 340 commitments, which are not as secure as they were. Emirates demand has been slowing and it is considering to defer deliveries, having the smallest sovereign wealth fund backing.

On November 20, Emirates reduced its order total to 115 in exchange for ordering 30 Boeing 787-9s, while remaining the largest 777X customer.