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.

"This is about where’s the pressure and how do we alleviate the pressure," Transportation Secretary Sean Duffy said.

He also said that even if the government shutdown ends, flights won't return to normal instantly, as it will take time to restore staffing levels and schedules. Load any apps related to your airline or airport onto your phone -- they can send you information about delays and cancellations.

Flight cancellations across the U.S. could rise to 15%—or even 20%—if the government shutdown continues, Transportation Secretary Sean Duffy said.“If this shutdown doesn’t end relatively soon, the consequence is that more controllers don’t come to work,

More flight cancellations are expected at Denver International, which is among 40 total airports impacted nationwide this weekend.

The FAA will reduce air traffic at 40 airports beginning Friday. Philadelphia International Airport is among those expecting flight cuts and delays. Talks between Democrats and Republicans to end the shutdown are intensifying,

U.S. airlines began canceling hundreds of flights Thursday due to the Federal Aviation Administration’s order to reduce traffic at the country’s busiest airports starting Friday because of the government shutdown.