The United States Federal Aviation Administration (FAA) has ordered a nationwide suspension of airline departures following reports of air traffic control communications failures, triggering widespread flight delays and cancellations across the country.
The emergency directive was issued on Friday, 13 November, at approximately 3:54pm US Eastern Standard Time (7:54am Saturday, 14 November AEDT), requiring aircraft operators at airports throughout the United States to suspend departures until further notice.
The FAA’s Air Traffic Control System Command Center issued Advisory 111, identifying the action as a national ground stop.
In its official operational advisory, the FAA stated:
“Due to extraordinary circumstances and for reasons of safety.”
The directive instructed aircraft operators to keep departing aircraft on the ground, while international flights arriving in the United States would be assessed individually.
The FAA said: “All departing traffic should remain ground stopped until further notice. Inbound international flights will be managed on a case by case basis.”
The agency did not immediately provide a detailed explanation of the underlying technical failure or indicate when normal operations would resume.
The grounding followed earlier reports of equipment and communications problems affecting air traffic control operations, including an initial ground stop involving Chicago O’Hare International Airport.
An earlier FAA advisory identified an equipment outage affecting Chicago before the restrictions were expanded nationwide.
US media subsequently reported communications failures involving air traffic control radio frequencies in several regions. However, the FAA had not formally confirmed whether a single nationwide communications failure, multiple equipment faults or another technical problem was responsible for the emergency order.
The distinction is significant because air traffic control relies on communications between controllers and aircraft, supported by interconnected radar, navigation, surveillance and flight management infrastructure.
Failures affecting these systems can require aircraft movements to be restricted while authorities establish that safe separation and operational communications can be maintained.
The nationwide ground stop is among the most disruptive measures available to US aviation authorities and is rarely imposed across the entire national airspace system.
Unlike a complete airspace closure, a ground stop prevents affected aircraft from departing while allowing aircraft already airborne to continue operating under applicable air traffic control instructions.
The FAA’s advisory specifically provided for inbound international services to be managed individually, rather than automatically prohibiting all aircraft movements.
The disruption immediately affected airline schedules at major US aviation hubs, with delays expected to cascade across domestic and international networks.
According to flight-tracking data cited by Travel Market Report, more than 21,500 flights had been delayed globally and more than 900 cancelled by approximately 4:30pm US Eastern time. The figures included 6,575 delays and 323 cancellations associated with US air traffic.
These figures represented the broader operational situation at the time and should not all be attributed directly to the nationwide ground stop.
Boston Logan International Airport confirmed that it was operating under the FAA’s emergency directive and advised passengers to contact airlines for updated flight information.
The airport said it was monitoring developments and coordinating with federal aviation authorities and airline operators.
The suspension occurred during a busy Friday afternoon travel period, increasing the likelihood of significant disruption to aircraft positioning, flight crews, connecting passengers and subsequent scheduled services.
International airlines operating flights to and from the United States could also experience delays and schedule changes as the restrictions affected domestic connections and aircraft movements.
The incident follows a series of significant disruptions involving US air traffic control infrastructure, including a January 2023 nationwide ground stop caused by a failure of the Notice to Air Missions (NOTAM) system.
That incident resulted in thousands of delayed and cancelled flights and prompted renewed scrutiny of the reliability of ageing aviation technology.
More recently, a September 2026 telecommunications outage disrupted major airports in the northeastern United States after a primary communications circuit failed and a backup fibre-optic cable was accidentally severed during construction work.
The September incident affected airports serving New York, Newark, Philadelphia and Boston, highlighting the importance of communications redundancy within the national air traffic management system.
The latest grounding raises further questions about the resilience of US aviation infrastructure, including the reliability of communications systems, equipment maintenance, network redundancy and the ability to maintain safe operations during major technical failures.
The FAA has been pursuing a modernisation programme aimed at replacing ageing air traffic control technology, improving communications and surveillance infrastructure, and addressing operational vulnerabilities across the national airspace system.
While the latest disruption has prompted speculation about possible cyber security implications, there is currently no verified evidence linking the incident to a cyberattack or deliberate interference.
The FAA has not publicly attributed the nationwide grounding to malicious activity, and reports of communications failures remain subject to further official confirmation.
As of the latest information available for this report, the FAA had not issued a verified public explanation establishing the root cause or confirming the complete restoration of nationwide flight operations.
The incident is expected to prompt further examination of aviation system resilience and the consequences of failures affecting critical communications infrastructure.
Official operational information is available through the FAA National Airspace System Status and the FAA Daily Air Traffic Report.
