What to know about canceled flights across the U.S.:

Airlines are expected to cancel 4% of their flights at 40 of the busiest airports in the U.S. on Monday to comply with an order from the Federal Aviation Administration amid the government shutdown .

Officials said the FAA order was an effort to address strain on the national airspace system as the agency dealt with a shortage of air traffic controllers.

Over 1,700 flights were canceled as of Monday afternoon on the East Coast.

The FAA wants airlines to increase the cancellations at the 40 airports to 6% by Tuesday and ultimately ramp up to 10% by Friday.

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Over 1,700 flights canceled as of Monday afternoon

More than 1,700 of Monday's flights within, into or out of the U.S. have been canceled, according to Fligh

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