Boeing on Wednesday announced an order from Gulf airline flydubai for 225 medium-haul 737 MAX aircraft with a list price of $27 billion, hailing it as the "largest-ever single-aisle jet order" from a Middle East carrier.

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 US investment firm Indigo Partners at a catalogue price of $49.5 billion (42 billion euros).