United Airlines experienced significant disruptions across the U.S. as a technology glitch led to the grounding of flights nationwide. More than 1,000 flights were delayed, forcing the airline to implement ground stops as it worked to resolve the technical issue. Although operations have resumed, passengers still face residual delays in multiple cities, including Chicago and Newark. The airline has assured that the problem has been resolved, but travelers are urged to check their flight statuses as recovery continues and cancellations remain possible.