WASHINGTON — Airports in major U.S. cities will have fewer flights starting Friday as the Federal Aviation Administration to ease the strain on air traffic controllers during the government shutdown.

The airports directly impacted include some of the nation's busiest, including Atlanta, Denver, Dallas, Orlando, Miami and more. A list of the 40 airports was distributed to airlines and .

Airlines scrambled to adjust their schedules and began canceling flights Thursday in anticipation of the FAA's official order, while travelers with plans for the weekend and beyond to learn if their flights would take off as scheduled.

Airlines also planned cancellations into the weekend, directing passengers to .

More than 820 flights have been called off nationwide, according to FlightAware. Delta Air

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