The US Federal Aviation Administration issued a ground stop advisory for all Alaska Airlines' mainline and subcarrier flights

An issue with the weight and balance calculation system for Alaska Airlines planes was resolved on Wednesday morning, leading to the U.S. Federal Aviation Administration (FAA) lifting a ground stop that had been put in place.
The ground stop, affecting all Alaska Airlines and Horizon Air departures, was implemented around 7:50 am PT (1450 GMT) and lasted for about an hour.
Alaska Airlines stated, "This morning we experienced an issue while performing an upgrade to the system that calculates our weight and balance." The airline anticipates some residual flight delays throughout the day.
Earlier, the FAA mentioned that the carrier had requested a pause in its mainline departures nationwide.
Shares of Alaska Air Group, the airline's parent company, initially rose but later pared gains after the advisory, trading up 2.6% at 11:51 ET (1551 GMT).
Addressing passenger concerns on the social media platform X, the airline assured that it was working to resume operations promptly.
The FAA clarified that flights operated by SkyWest, which provides regional service for Alaska Airlines and other carriers, were not affected by the ground stop.