Alaska Airlines stated that the IT outage resulted in a “temporary, system-wide ground stop for Alaska Airlines and Horizon Air flights” around 11 p.m. ET and lasted until 2 a.m. Monday, the airline wrote in a statement on X.

Four flight attendants on the Alaska Airlines, 737 MAX 9 plane that experienced a mid-air cabin panel blowout in January last year are suing Boeing for physical and emotional injuries.