New Delhi, Nov. 10 -- US airline disruptions soared on Sunday as flight cancellations crossed 2,100, marking the highest since the federal government shutdown led to widespread operational cuts across the aviation sector.

Transportation Secretary Sean Duffy warned that air traffic across the country could "slow to a trickle" if the government shutdown extends into the Thanksgiving holiday season, when a lot of people make travel plans.

The FAA last week ordered flight cuts at 40 of the nation's busiest airports after some air traffic controllers, who have gone unpaid for nearly a month, stopped showing up for work, the Associated Press reported.

The slowdown, now in its third day, is beginning to cause more widespread disruptions acros...