Hundreds of Alaska Airlines flights and thousands of passengers’ travel plans were disrupted over the weekend and well into Monday following a “significant IT outage” that resulted in the grounding of...

Alaska Airlines grounded all its flights due to an undisclosed technical error affecting its entire system, the carrier announced early Monday.

The carrier experienced an “IT outage that resulted in a temporary, system-wide ground stop for Alaska Airlines and Horizon Air flights” around 8 p.m. Pacific time Sunday.