On the evening of July 20, 2025, Alaska Airlines (including regional partner Horizon Air) requested a system-wide ground stop after a critical IT hardware failure at its data center compromised key operational systems. The pause, which halted departures across its entire mainline fleet, lasted approximately three hours before flights resumed. The outage resulted in significant disruptions—affecting over 200 aircraft, triggering hundreds of cancellations and delays as operations gradually returned to normal.
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