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Alaska Airlines resumes flights after software outage grounds entire fleet

Alaska Airlines Resumes Flights Following Nationwide IT Outage
Alaska Airlines has restored flight operations after a significant IT failure forced the airline to ground its entire fleet, including that of its regional subsidiary, Horizon Air. The disruption began late Sunday night, July 20, 2025, when a critical hardware malfunction triggered a software outage, halting all departures across the airline’s network.
Widespread Grounding and Operational Impact
The problem was first reported around 11 p.m. Eastern Time and rapidly escalated, leading Alaska Airlines to implement a full ground stop affecting more than 200 aircraft. The Federal Aviation Administration (FAA) confirmed the suspension, which was subsequently extended to include Horizon Air. This unprecedented outage resulted in extensive delays and cancellations, impacting passengers nationwide.
By approximately 2 a.m. on Monday, Alaska Airlines announced the lifting of the ground stop and the gradual resumption of flights. Nevertheless, the airline warned that residual disruptions would persist as it worked to reposition aircraft and crews. “It will take some time to get our overall operations back to normal,” the company stated via social media, urging travelers to anticipate ongoing schedule irregularities.
Broader Implications for Airline IT Infrastructure
This incident highlights the vital importance of robust operational software and IT infrastructure in contemporary airline management, as well as the susceptibility of air travel to technical failures. Beyond immediate operational challenges, the outage has raised concerns regarding the reliability of Alaska Airlines’ IT systems. Industry analysts suggest that competitors may be closely monitoring the situation for potential operational or reputational advantages.
As of Monday morning, while flights have resumed, Alaska Airlines continues to experience cancellations and delays as it strives to restore full service. The airline has yet to disclose further details about the specific hardware failure responsible for the outage. Passengers are advised to verify their flight status and prepare for continued disruptions throughout the day.

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