The FAA ordered flights grounded across the Midwest after a temporary outage at a Minnesota air traffic control facility disrupted operations throughout the region.

The agency confirmed the grounding in a statement identifying the affected facility in Minnesota as the source of the failure. The outage interrupted air traffic services over a wide section of the national airspace system, forcing controllers to halt departures at multiple airports until service was restored.

The FAA described the outage as temporary. Ground stops of this scale are typically issued when a facility loses the ability to safely separate traffic, whether through radar, communications or data-processing failures, and they cascade quickly: aircraft already airborne divert or hold, while departure queues build at hubs and spoke airports alike.

Airlines operating through the affected airspace faced immediate schedule disruption, with knock-on delays likely to persist through the day as carriers resequence aircraft and crews. The Midwest corridor carries a heavy share of connecting traffic for the major US network carriers, so even a short-duration stop can compound into hundreds of delayed flights systemwide.

The FAA has not yet detailed the technical cause of the failure. The incident adds to a string of high-profile air traffic control outages in recent years that have exposed the fragility of aging ATC infrastructure, and it will intensify scrutiny of the agency's equipment modernization programs at a time when controller staffing and system reliability remain under congressional oversight.

The FAA said it would investigate the cause of the outage and work to restore normal traffic flows; carriers will be assessing the operational and cost impact as delay tallies become clear.