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.

More than 1,000 flights have been canceled and at least 5,000 delayed today, mostly due to a combination of air traffic controller staffing issues and an FAA-mandated 4% cut to flights because of the government shutdown.

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,

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.

Anxious travelers across the U.S. felt a bit of relief Friday as airlines mostly stayed on schedule while still cutting more than 1,000 flights largely because of the government shutdown. Plenty of nervousness remained,

Are international flights affected by flight cuts, airport reductions amid government shutdown? What to know and how to check, flight status tracker

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.