The U.S. Treasury Department approved the sale between Boeing and Iran Air in September; it’s the first agreement of its kind in nearly four decades. Boeing said the sale includes 50 737 planes and 30 777 aircrafts, and will support nearly 100,000 U.S. jobs.

It’s unclear what impact President-elect Donald Trump could have on the deal. His Republican supporters in Congress introduced a bill to stop the sales, but Obama said he would veto the legislation if it made it to his desk, the New York Times reports.

The first airplanes are scheduled for delivery in 2018, Boeing said.