Alaska Airlines halted all departures at all US airports on the day due to a system failure.
The airline announced that it was "facing an system disruption impacting flight schedules" and implemented "an operational pause."
The airline did not say how long the outage would last or the number of flights were affected. It stated it was "actively restoring our services" following the outage.
The ground stop also affected the regional carrier, which is a subsidiary of Alaska Airlines, as per an notice by the aviation authority.
Alaska Airlines, a member of The Alaska Air Group based in Seattle, Washington, mainly serves on the western seaboard of the United States. It connects 140 destinations globally, including multiple states and 12 countries, according to its online platform.
Previously, the carrier joined forces with another carrier, which was not impacted by the day's ground stop.
It is the second IT outage affecting the carrier in recent months. Earlier this year, an issue disrupted operations for about three hours.
The company did not immediately respond on Thursday to media inquiries.
US air travel has been disrupted in the past few weeks due to federal budget issues that began earlier this month. Lack of flight controllers reporting for duty has delayed flights at several airports.
