United Airlines says a sudden technology outage disrupts operations nationwide, leading to widespread delays. Multiple reports indicate the outage affects core passenger services, including check-in and boarding systems, which in turn slows gate processing and contributes to flight delays across the airline’s network. Passengers experience disruptions ranging from longer wait times at airports to difficulty completing check-in procedures. Airlines affected by similar system failures typically rely on manual workarounds while technical teams restore services, and schedules can remain unstable until connectivity and ticketing and gate systems return to normal. United does not report a safety incident in the coverage but focuses on the impact to customer-facing operations. The disruptions are reported as broad-based, not limited to a single airport or region, suggesting the underlying problem is tied to airline-wide technology infrastructure rather than local equipment. Travelers are advised to check flight status updates as delays continue to be managed while systems are restored.