Travelers will have fewer flight options within the U.S. starting Friday as the Federal Aviation Administration imposes schedule cuts at 40 major airports to ease the strain on air traffic controllers during the record-long government shutdown.

Major airlines say that most passengers whose flights are canceled, and many who choose not to fly, will be eligible for refunds and no-fee rebookings.

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 have begun to take effect after the Federal Aviation Administration ordered a scaleback of flights nationwide because of the record-long government shutdown.

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.

Transportation Secretary Sean Duffy announced 40 major airports would face a 10% cut in flights. See the full list of impacted airports.

The FAA has ordered airlines to cancel hundreds of flights, citing fatigue among air traffic controllers, leaving travelers across the country scrambling.

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