‘Extraordinary circumstances’ ground all U.S. flights, affecting Canadian airports

The FAA ordered an immediate nationwide ground stop on all departures across the United States, describing the action as extraordinary and safety-related within the National Airspace System. The directive halted outbound flights at airports nationwide and indicated that traffic would remain ground-stopped until further notice, with no end time provided in the initial advisory, according to multiple outlets reporting on the event.

Officials described the stoppage as precautionary and focused on safety, with the measure affecting departures countrywide while international arrivals would be processed on a case-by-case basis as the situation evolved. Several outlets characterized the action as unprecedented in scale and described it as two-phase in practice: an immediate halt to new departures, followed by ongoing FAA updates as investigators assessed root causes. There were no end times disclosed in the initial statements, and the coverage consistently noted that no specific airports, airlines, or aircraft were singled out in the advisory.

A location-specific development emerged in Chicago, where O’Hare International Airport had departures held from 1:00 p.m. to 2:15 p.m. local time due to thunderstorms. The FAA signaled a possible extension of the pause within that window, with estimates suggesting a 30% to 60% chance of extension depending on evolving weather conditions. Chicago-area reporting described mostly cloudy skies with rain and thunderstorms in the region and noted ongoing flight cancellations and delays at the hub, alongside broader national disruption.

National coverage indicated the stoppage was nationwide and primarily affected outbound departures, while arrivals were evaluated on a case-by-case basis as conditions evolved. Reports described air traffic operations as effectively frozen for new departures, with aircraft already in flight continuing to their destinations under the last assigned clearances. The situation was described by some outlets as ATC Zero, a scenario in which no new departures would be cleared until airspace operations could be stabilized and restored.

Canadian outlets reported that Canadian airports suspended flights to and from the United States in response to the nationwide ground stop issued by the FAA. The measure affected flights operating between Canada and U.S. airspace and produced nationwide limits on both departures and arrivals, though no specific airports, flight numbers, or durations were listed in those reports. Officials framed the action as a response to the FAA ground stop, with no causal details provided in the material.

Additional reporting noted that Reno-Tahoe International Airport and Reno-Stead Airport were among those noted as holding all departures until further FAA direction, illustrating the breadth of the impact beyond U.S. borders. Coverage described travelers being urged to check with their airlines for updates and reiterated that the ground stop’s exact cause remained unspecified in initial communications. The reporting consistently emphasized the temporary nature of the disruption and the lack of disclosed end date.