Secretary Sean Duffy issued the warning amid a growing number of flight delays at airports across the country.

The FAA will cut 10% of US air traffic at 40 major airports starting Friday if the government shutdown continues, citing severe air traffic controller shortages. Officials say the move aims to maintain safety as unpaid controllers call in sick,

Transportation Secretary Sean Duffy warned this week that parts of U.S. airspace may need to close if the government shutdown continues.

Transportation Secretary Sean Duffy said the agency may need to close "certain parts" of the nation's airspace if the shutdown drags on.

The Federal Aviation Administration is reducing flights in 40 “high-traffic” markets by 10% due to staffing shortfalls resulting from the government shutdown, officials announced on Wednesday, as employees are increasingly calling out instead of working without pay.

With flight delays on the rise nationwide, Transportation Secretary Sean Duffy cautions that the situation may get worse the longer the government shutdown continues.

The Department of Transportation might be forced to shut down the airspace in certain parts of the country if the government shutdown continues into next week.