Secretary of Transportation Sean Duffy said airlines are "going to lose millions of dollars" after the FAA instituted flight reductions due to the shutdown.

U.S. airlines cancelled more than 1,000 flights and delayed more than 3,000 others on Friday as passengers scrambled to rejig their schedules after Donald Trump’s administration ordered flight reductions at major airports.

Starting Friday, the FAA is reducing flights at 40 high-traffic airports, citing safety concerns amid the government shutdown.

The Federal Aviation Administration is cutting flights at 40 U.S. airports beginning Friday, Nov. 7, as air traffic controllers and TSA agents continue to go unpaid during the government shutdown.

MY NO. 1 JOB IS SAFETY' ✈️ The transportation secretary explained what led to the decision to cancel flights, and why it's not affecting international travel.

Duffy said the FAA's decision to increase air traffic reductions to 10% is necessary as air traffic controllers call in sick while not receiving pay during the government shutdown.

Under an emergency order issued by the FAA on Thursday, airlines are required to reduce operations at the 40 "high-impact airports" by 6% by Nov. 11 and by 10% by Nov. 14. Any airline that does not comply will be fined $75,000 per flight over the limit, according to the FAA order.

Transportation Secretary Sean Duffy said Friday that flight reductions could go as high as 20 percent if the government shutdown drags on, as the Federal Aviation Administration begins reducing

Transportation Secretary Sean Duffy announced new airspace restrictions Wednesday as the ongoing federal government shutdown continues to strain the nation’s

A document released on Nov. 6 outlines restrictions to the FAA, and this includes a curfew on commercial space launches.