Timing is everything — except when it isn't. US carrier Alaska Airlines has grounded its fleet once again due to a mystery IT issue.

The problem began at 3:30 pm Pacific Time on October 23 with a "failure" at the company's primary data center. Alaska Airlines insisted it wasn't a cybersecurity event or related to "any other events."

The result? A systemwide ground stop of Alaska and Horizon Air flights, though Hawaiian Airlines (which joined Alaska in 2024) was apparently unaffected.

"The IT outage has impacted several of our key systems that enable us to run various operations, necessitating the implementation of the ground stop to keep our aircraft in position," Alaska Airlines said. "The safety of our flights was never compromised."

The ground stop wasn't lifted until 11:30 pm Pacif

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