Two Saudi Arabian airlines said Tuesday they will order 78 jetliners from Boeing and take options to buy 43 more in a major boost for the American aircraft manufacturer. The order for Boeing 787s will be divided between Saudi Arabia’s flag carrier, Saudia, and a planned new airline called Riyadh Air, which Saudi officials introduced over the weekend. At list prices, the combined deal would be worth about $37 billion if the options are exercised, but airlines routinely get deep discounts. The creation of Riyadh Air by the Saudi sovereign-wealth fund and the growth of Saudia are part of a broader Saudi strategy to diversify its oil-based economy. Saudi Arabia hopes to become a global aviation hub and attract 100 million annual visitors by 2030. “The ambition here in the kingdom is huge, and this today ... is our first big order,” Tony Douglas, the CEO of Riyadh Air, told CNBC. “There will be more orders." The planes covered by the orders and options are long-range, two-aisle “widebody” jets, in the industry jargon. Boeing and Europe's Airbus dominate the market. “Serving the Middle East, in our view, is a very, very important and critical market for widebodies, and we like that Boeing won this one,” said Boeing CEO David Calhoun, who traveled to Riyadh for the announcement. The Saudi deal is also a boost for the Boeing 787, which the company calls the Dreamliner. Boeing has struggled with interruptions in delivering new 787s for more than two years because of production flaws. Shares of Boeing Co., based in Arlington, Virginia, rose more than 4% Tuesday. “We are particularly pleased that Boeing was able to finally conclude these deals with Saudi Arabia after years of discussions, and intensive negotiations over recent months,” said White House press secretary Karine Jean-Pierre. She called the announcement “another milestone in eight decades of cooperation between Saudi Arabia and American industry.” The Saudi deals will support about 1 million jobs in 44 states across the US supply chain, including 150,000 new manufacturing jobs, according to administration officials. The planes will be powered by engines from General Electric Co. The Saudi orders come as a recovery in air travel boosts demand for jets made by Boeing and Airbus. Last month, Air India announced it had agreed to buy 220 planes from Boeing and 250 from Airbus. Both the Air India and combined Saudi Arabian order rank among Boeing's five largest.