A sweeping U.S. winter storm of snow and ice delivered the worst single day of flight cancellations since the Covid-19 pandemic, grounding more than 11,000 flights and triggering roughly 17,000 delays on Sunday, according to U.S. Transportation Secretary Sean Duffy. The disruption, hitting during a high-volume weekend travel window, strained airlines, airports and utilities and raised the risk of continued delays into the start of the workweek.
