Overview

• United asked the FAA to impose a ground stop around 1 a.m. ET on Sept. 24, and departures resumed roughly 30 to 36 minutes later.
• United said the outage stemmed from an inability to connect to its technology network during maintenance and was not related to a cybersecurity threat.
• FlightAware reported more than 170 United delays and 14 cancellations by midday Wednesday; United said no cancellations were caused by the outage and only a small number of delays were linked to it.
• The brief halt followed an Aug. 6 technology disruption that paused United departures at major hubs, which Transportation Secretary Sean Duffy previously described as internal to United rather than an air‑traffic control issue.
• Hours after United’s pause, American Airlines reported a technical problem affecting maintenance applications that produced departure delays; the carrier initially reported no cancellations even as FlightAware showed widespread delays and some cancellations.