The airline was "working to resolve the tech outage as quickly as possible," the company wrote on X. The ground stop was issued through at least 8 p.m., with a medium, or roughly 30-60%. probability of being extended, according to the FAA.

The New York Times reports that United had full stops at its hub locations in Newark, New Jersey; Chicago; Denver; Houston and San Francisco, citing the Federal Aviation Administration (FAA). The FAA's website also notes that the ground stop was still live in Denver and Newark at 10:28 p.m. ET and will be in effect until 11 p.m.