DUBAI, United Arab Emirates — The biennial Dubai Air Show opened on Monday with hometown airline Emirates ordering 65 of Boeing's upcoming 777-9 aircraft, as the carrier looks to increase its fleets off record earnings and unending demand for flights through this East-West travel hub.

Emirates valued the deal with Boeing and GE Engines at $38 billion at list prices, although airlines often negotiate lower prices in major orders.

Emirates is betting big on Boeing's next plane

The announcement brings the total of Boeing 777-9s on order for Emirates to 270, making it Boeing's largest customer for the aircraft, even as the plane has suffered repeated delays in entering service. Emirates relies heavily on the double-decker Airbus A380 and the Boeing 777, and has also started flying the Airbu

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