Qatar Airways has agreed to buy up to 210 jets from American manufacturing giant Boeing, according to US President Donald Trump, who announced the $96bn order as part of his tour of the Middle East.
The White House said the deal would support 154,000 jobs in the US each year of production and marked the largest-ever order of 787 Dreamliners, a wide-body jet used for longer flights.
Qatar Airways and Boeing did not immediately comment.
It is the second deal involving Boeing to be announced as part of Trump's trip, marking a win for the company as it tries to rebuild its business after a series of manufacturing and safety issues.
The blow-out of a panel on one of its planes in January 2024 forced a dramatic slowdown in its manufacturing operations and sparked a more than $10bn loss last year.
But shares in the company, which was also hurt by a seven-week strike by some of its workers, have climbed roughly 20% since January, an indication of increased optimism about the firm's prospects.
Boss Kelly Ortberg told investors in April that the firm's recovery plan was in "full swing" after the firm delivered a greater-than-expected 130 aircraft in the first three months of the year.
Executives said the firm still had a backlog of 5,600 planes, amounting to more than seven years of production.
The Qatar Airways deal, which includes 777X aircraft as well as Dreamliners, was part of more than $240bn in "economic deals" between the US and Qatar that the White House announced as part of the trip.
It would deepen a longstanding relationship between Boeing and the state-owned airline, which already had 150 Boeing airplanes in its fleet and more than 130 jets on order, according to Boeing's website.
"It's the largest order of jets in the history of Boeing, that's good," Trump said at the signing "So that's a record, Kelly, and congratulations to Boeing. Get those planes out there, get them out there."
As part of Trump's trip, Boeing had previously announced it had won a commitment from Saudia Arabia's Avilease, which leases planes to airlines, to buy 20 737 MAX planes, with options for 10 more.
British Airways owner IAG also said earlier this month that it had placed an order for 32 787-10 aircraft worth $13bn, a deal Trump previewed as part of his US-UK trade announcement. Those are set to start being delivered in 2028.
The trade truce between the US and China has also helped to ease a challenge for the firm, whose customers in China had stopped accepting planes as tariffs escalated.
"Boeing's turnaround has been fraught with difficulties, not least last year's strike, so this deal will feel like a significant win coming hot on the heels of China's decision to allow its airlines to bring in planes that are currently on order, at least for now," said AJ Bell head of financial analysis Danni Hewson.