United Airlines travelers encountered delays stemming from a “technology issue” that halted flights for multiple hours on Wednesday. The situation began at 5:12 p.m. CT / 6:12 p.m. ET / 3:12 p.m. PT, impacting flights in San Francisco, Chicago, Denver, Newark, and Houston, as indicated by Reuters referencing the U.S. Federal Aviation Administration’s website. Flight tracker FlightAware reported that more than 1,000 United flights experienced delays on Wednesday.

Travelers noted extended waits on the tarmac, delays in baggage claim, and flight options pushed to subsequent dates. United’s X team has been tackling these issues via social media. United mentioned they are striving to transport customers to their destinations following the technology disruption, which has been rectified, though some delays might continue as operations normalize.

United shared updates on X around 8 p.m. ET recognizing the “system error” and urged travelers to send their flight confirmation numbers through DM.

As per The New York Times, United clarified that the outage was not a cybersecurity concern but was connected to a system named Unimatic, which oversees flight information and integrates with other platforms. The FAA communicated on X around 10 p.m. ET, announcing they are aiding United in rectifying the issue and managing the flight backlog.

Affected passengers are recommended to reach out to United on X via DMs with their confirmation number and email for support. They may also visit United’s website to engage with the chatbot, contact an agent, or text “UNITED” to 32050 for customer assistance.