The FAA released the list of affected airports Thursday, with a focus on areas that have been struggling most with air-traffic-control staffing shortages. The list includes some of the nation’s biggest, busiest airports, including those in Atlanta, Chicago, Dallas and New York City.

The Federal Aviation Administration’s announcement of a 10% reduction in flight capacity across 40 major U.S. airports could put a strain on the air cargo as the peak holiday season approaches. Several airports with major package distribution centers are on the list of airports that will reduce capacity — FedEx has hubs at the

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.

Follow our coverage from Republic reporters of the effect of the federal government shutdown on air travel and Phoenix Sky Harbor flights.

Travelers can expect to see fewer flights to many major U.S. cities starting Friday morning. That's when the Federal Aviation Administration says it will reduce traffic across 40 airports to ease the load on the nation’s air traffic controllers.

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 (FAA) begins reducing flights by 10 percent due to air traffic controller staffing shortages.

The FAA said it is reducing flights in Philly and other cities to alleviate pressure on air traffic controllers amid the government shutdown.