Due to a severe winter storm, widespread flight cancellations and delays occurred in the Eastern Time Zone on December 26, impacting operations for multiple airlines. As of 12:00 PM Eastern Time, American Airlines had canceled 1,097 flights, with an additional 3,608 flights experiencing delays. This winter storm is primarily concentrated in the Great Lakes region, the Mid-Atlantic, and southern New England, causing a ripple effect on operations at regional aviation hubs.

The U.S. National Weather Service issued a winter storm warning on the 26th, stating that the aforementioned areas will experience snowfall, ice, and strong winds, which could significantly deteriorate road and air travel conditions. The related impacts are expected to last until the morning of the 27th. Affected by the winter storm, the on-time performance rate at major airports such as New York and Boston has dropped significantly. American Airlines has activated contingency plans, offering rebooking and refund services to affected passengers. Meteorological authorities advise travelers to closely monitor flight status updates and plan their trips accordingly. The duration and intensity of this winter storm remain uncertain, and relevant departments are closely monitoring weather changes.