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.

American Airlines said that the 4% reduction will mean 220 canceled flights per day. The vast majority of impacted American Airlines flights are regional, and there’ll be no impact to international flights including Mexico, Canada and the Caribbean, CEO David Seymour said in a letter to employees. Further hub-to-hub routes impact will be minimized.

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.

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,

The Federal Aviation Administration will reduce flight capacity by 10% at 40 major airports across the country, officials announced during a press conference on Wednesday. The decision could cut thousands of flights per day.

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,

Phoenix Sky Harbor Airport is one of the airports where the FAA plans to cut flight capacity due to air traffic control shortages. What we know.

U.S. airlines on Friday scrambled to cut 4% of flights at 40 major airports after the government imposed an unprecedented cut to air travel citing air traffic control safety concerns because of a record-setting government shutdown.

FAA’s flight reductions at major airports will strain capacity for time-sensitive shipments like pharmaceuticals, electronics and perishables.