More than 1,500 flights have been canceled by US airlines Monday and hundreds more delayed as the longest government shutdown in history enters its 41st day — causing travel chaos at some of the nation’s biggest airports.

At America’s busiest airport, Hartsfield-Jackson in Atlanta, 11% of incoming flights had been axed as of 8 a.m. Monday and 5% of outgoing flights had been canceled — totaling more than 200 flights in total, according to FlightAware.

Chicago’s two airports were also among those hit the hardest, with more than 300 flights in and out of Chicago O’Hare scrapped and more than 100 in and out of Chicago Midway, the data shows.

More than 1,300 flights within, into or out of the US were also delayed early Monday.

New York City’s major airports, LaGuardia, Newark Liberty and

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