Boeing and Singapore Airlines (SIA) announced a deal worth up to $13.8 billion for 20 Boeing 777-9s and 19 Boeing 787-10s during a ceremony at the White House. The airline has the option for 12 additional aircrafts, six of each type.

The ceremony was attended by Singapore Prime Minister Lee Hsien Loong, Singapore Airlines’ CEO Goh Choon Phong, Boeing Commercial Airplanes’ President and CEO Kevin McAllister, and US President Donald Trump.

President Trump said the purchase will help create 70,000 jobs in the US.

"SIA has been a Boeing customer for many decades and we are pleased to have finalized this major order for widebody aircraft, which will enable us to continue operating a modern and fuel-efficient fleet," said Goh. "These new aircraft will also provide the SIA Group with new growth opportunities, allowing us to expand our network and offer even more travel options for our customers."

Singapore Airlines already has more than 50 777s in service and serves as Boeing’s launch partner for the 787-10 during the first half of 2018. The additional purchase of 19 787-10s puts the airlines total at 49 on order. This fleet will make up the airline’s media-range operations, while 777-9s will take on long-haul routes.

"Boeing and Singapore Airlines have been strong partners since the airline's first operations 70 years ago and we are thrilled to finalize their purchase of 20 777Xs and 19 additional 787-10 Dreamliners," said McAllister.

The 787-10 will be the largest member of 787 family. The 777-9s are expected to arrive in the 2021-2022 financial year.