"Winter Storms Cause Thousands of Flight Cancellations Across US"

Harsh winter conditions continue to disrupt travel in the U.S., with over 5,400 flights delayed or canceled on Tuesday. Southwest Airlines leads with the most disruptions, having canceled 391 flights and delayed 518. The snow, ice, and freezing temperatures across the Northeast, Midwest, and mid-Atlantic have caused thousands of flight cancellations over the holiday weekend. The National Weather Service predicts ongoing wintry weather, including snow and freezing rain, with more cold temperatures and snow expected later in the week.