Boeing Co. says that Garuda Indonesia placed an order for 50 jets with a total sticker price of $4.9 billion.
Airlines often get steep discounts off list prices for jets.
Boeing said Sunday that Garuda will buy 46 of its 737 Max 8 aircraft and convert orders for four other 737s to the Max 8. The plane is designed to be more fuel-efficient than current models of the single-aisle jet. The first delivery of a 737 Max to an airline is scheduled for 2017.
Boeing and rival Airbus have huge backlogs of commercial jet orders as airlines dealing with high fuel prices order more efficient planes.
Boeing says it has received 2,295 orders for the 737 Max models from 47 airlines and other customers worldwide.