Jakarta-based Lion Air will commit to buy 201 of Boeing's new 737 MAX aircraft and 29 737-900 extended range aircraft, Boeing said in a statement. The deal is valued at $21.7 billion at list prices, though airlines rarely pay full list price.
That tops the dollar value of an order announced earlier this week from Emirates. The airline ordered 50 777s.
Boeing said Lion Air's order also was its biggest order by number of airplanes. The company said Lion Air also took out options for an additional 150 airplanes.
U.S President Barack Obama is scheduled to witness the official announcement at a ceremony Friday morning at the East Asia Summit in Bali, Indonesia.
In July, American Airlines placed an order for 200 Boeing planes, including the 737 MAX, as part of a massive plane purchase that pitted Boeing against its chief rival, Airbus. American at that time said it would buy 260 planes from Airbus and 200 from Boeing. American has options for 465 more planes from the two manufacturers.
Boeing said recently that it has commitments for 700 of its 737 MAX from nine customers. American and Lion Air are the only airlines to announce themselves as 737 MAX customers.
The Associated Press contributed to this report.
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