Alaska Airlines took the decision to ground its entire fleet, including Horizon Air, following a system-wide IT failure on Sunday evening. The FAA issued an advisory affecting over 200 aircraft, resulting in extensive delays and cancellations across all destinations served by the airline. Passengers are advised to monitor their flight status amidst potential disruptions. The outage was attributed to a system-wide IT failure, prompting Alaska Airlines to request a temporary halt for all Alaska and Horizon Air flights until the issue is resolved. Despite operations being impacted, the airline has not confirmed the timeline for full service restoration. Additionally, other airlines or systems beyond Alaska’s network have not reported any influence from the outage.