DUBAI: Emirates unveiled a $9 billion order for 30 Boeing 787 Dreamliners on Wednesday, paving the way for a 16% reduction in orders for the delayed 777X airliner to 126 aircraft following intense last-minute talks during the Dubai Airshow.

The order shake-up completes a fleet review at the host chairman carrier that also saw Europe's Airbus leave the largest Middle East air show with a mixed result in wide-body orders from the world's largest buyer of wide-body long-haul jets.

Emirates tentatively ordered 40 Dreamliners in 2017 but "tough" talks to finalise the order this week had hinged on negotiations over the fate of a massive separate order for 150 777X after the latter ran into delays.

(Reporting by Alexander Cornwell, Editing by Tim Hepher) ((tim.hepher@thomsonreuters.com; +33 1 49 49 54 52; Reuters Messaging: tim.hepher.thomsonreuters@reuters.net))