Bombardier has landed a deal for up to 60 of its Belfast-made aircraft – worth up to £4.5bn.
The aerospace giant, which employs around 4,000 workers in Northern Ireland, secured a firm order from airBaltic for 30 of its CS300 passenger jets, and the option for a further 30.
Based on book price, the deal could be worth as much as £4.5bn.
Meanwhile, Bombardier has unveiled two new luxury business jets which will be part-made in Belfast.
It will build two new private planes, the Global 5500 and Global 6500 aircraft.
The plane-maker already makes the forward fuselage, engine nacelles and other components for the Global 5000 and Global 6000 business jets.
Earlier this year, Bombardier landed a contract American Airlines worth a potential £1bn for 30 regional jets, which are part-made in Belfast.
And in January, Bombardier’s Northern Ireland workforce breathed a sigh of relief when the US International Trade Commission last month ruled in its favour after a challenge by American rival Boeing. The firm had been facing a 292% tariff on the sale of its planes to the US.