Winter storm grounds US air travel: Over 10,000 flights cancelled on Sunday as snow batters major hubs

A severe winter storm has triggered widespread flight cancellations across the US, impacting over 10,000 flights on Sunday alone. Major airports in Dallas, Charlotte, Philadelphia, Atlanta, and New York are experiencing significant disruptions. Airlines are advising passengers to check their status and explore rebooking options, with refunds guaranteed if the trip is no longer desired.