A major winter storm is causing significant disruptions to air travel across the United States, leading to widespread flight cancellations and the issuance of travel waivers by airlines. According to Skift, over 1,500 flights scheduled for Saturday have already been canceled, and more disruptions are expected as the storm advances. The weather system is forecasted to bring heavy snow, sleet, and freezing rain, impacting regions from the Southern Rockies to New England.