Tech issue grounds flights across U.S., causing disruptions at B.C. airports

A blanket FAA directive grounded all departing flights across the United States in what multiple outlets described as extraordinary circumstances tied to a communications issue affecting air traffic control operations. The nationwide ground stop was issued as a precautionary safety measure, with officials stating that already airborne aircraft would continue toward their destinations under the last assigned clearances, while new departures would not receive clearance during the halt. Several reports noted there was no disclosed end time in the initial advisory, and travelers were advised to check with their airlines for updates.

Chicago’s O’Hare International Airport formed a location-specific carve-out to the nationwide halt, with departures paused from about 1:00 p.m. to 2:15 p.m. local time due to thunderstorms. The FAA directed the restriction within that window, and reports indicated a 30% to 60% chance the pause could extend depending on evolving weather conditions. Coverage highlighted the weather as a contributing factor to the disruption at O’Hare, with forecasters noting mostly cloudy conditions, rain, and thunderstorms, plus the potential for gusty storms in nearby northwest Indiana.

Beyond Chicago, Reno-Tahoe International Airport and Reno-Stead Airport were also noted as holding departures per FAA direction, illustrating the broader reach of the disruption. Reports consistently urged travelers to verify status with their airlines and stressed that the ground stop’s exact cause remained unspecified in initial communications. The overall framing described the halt as temporary within a wider nationwide action affecting departures.

Across national reporting, outlets uniformly stated there were no reported injuries, fatalities, or aircraft accidents associated with the ground stop or the weather event at that stage. The grounding was described as temporary, with the duration and the exact operational details left to subsequent FAA updates. Several outlets referenced the broader context of airspace management and ATC operations, signaling a state of centralized handling as regulators and air-traffic authorities pursued a clearer understanding of the root cause.

Reporting connected the ground stop to a parallel global technology outage that affected Microsoft services, which began on Thursday and extended into a second day. Some outlets described the outage as disrupting access to Microsoft 365 applications, including Exchange Online, Outlook, Teams, SharePoint, and Copilot in at least 74 countries, while Microsoft stated there was no evidence of a cyberattack. Airline communications and scheduling processes were reported as being strained by the outage, which was cited as a factor in cascading operational delays and confusion during the grounding.

Canadian outlets noted the cross-border implications of the U.S. action, suggesting possible knock-on effects for flights to and from American cities and for Canadian travelers facing delays or cancellations due to disruptions in U.S. air-traffic-control communications. The reporting framed the action as nationwide and outbound-only for departures, with arrivals subject to case-by-case handling as the investigation progressed. The broader safety and operations emergency was described as requiring centralized management by regulators and air-traffic authorities.

Overall, the event was characterized by the FAA as a temporary measure aimed at safety, with ongoing investigations into the root cause being coordinated by the appropriate aviation authorities in conjunction with U.S. officials. Initial reporting did not provide specific airports beyond the O’Hare carve-out or flight numbers affected, and did not establish particular causes or injuries. The situation was monitored as authorities pursued additional updates, and travelers were advised to stay in contact with their airlines for the latest information.