The battle of the plane makers is heating up this week.
The announcement, made at the Dubai Air Show, came just hours after rival Airbus said it had secured the biggest-ever order in its history to supply 430 medium-haul A320s to United States investment firm Indigo Partners at a catalogue price of $49.5 billion (42 billion euros).
Kuwait's Aviation Lease and Finance Company (ALAFCO) on Monday announced it was exercising options for 20 Boeing 737-8 MAX jets at the Dubai Airshow.
The plane maker said the new agreement includes a commitment for 175 MAX airplanes, and purchase rights for 50 additional MAXs in a deal that could "sustain tens of thousands of direct and indirect jobs" in the company's USA factories and network of suppliers.
Boeing and Flydubai have struck a deal worth $27 billion, representing the largest-ever single-aisle jet order from a Middle East airline. The deal, valued at Dollars 2.2 billion at current list prices, was announced as a commitment at the Paris Air Show.
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The new deal surpasses its previous record order of 75 MAXs and 11 Next-Generation 737-800s which was signed at the 2013 Dubai Air Show.
"This new aircraft order will support its continued expansion within a geographical area that is home to 2.5 billion people", the airline said.
But after a quiet start, Airbus seized the attention Wednesday with the enormous Indigo Partners deal, which it said was its "largest single commercial announcement ever".
Egyptair could announce indirect orders with Airbus and Boeing involving third parties, they added.
Boeing had a strong lead on its European rival in total orders for this year going into the Dubai event.
Budget carrier Flydubai on Wednesday ordered 225 new Boeing Co.