Reductions in flights are mandated to reach 6 per cent on Tuesday and then hit 10 per cent by Nov. 14.

Airlines cancelled more than 1,500 U.S. flights on Monday, the fourth consecutive day cancellations have topped 1,000 as government flight cuts and air traffic staffing absences continue to wreak havoc with aviation.

FlightAware, a flight tracking website, said by 8:30 a.m. ET, more than 1,550 flights had been cancelled and 1,400 delayed Monday after 2,950 flights were cancelled and nearly 10,800 delayed Sunday in the single worst day for flight disruptions since the government shutdown began on October 1.

A November winter storm in Chicago also disrupting air travel.

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