WASHINGTON, UNITED STATES — The United States has reopened its airspace after a nationwide aviation disruption forced authorities to ground departing flights for approximately five hours, with government officials attributing the breakdown to ageing air traffic control equipment and saying there is no evidence of a cyberattack.
The Federal Aviation Administration (FAA) lifted the nationwide ground stop at approximately 8:15 p.m. Eastern Time on Friday, November 13, after a telecommunications failure disrupted communications and radar information across the country’s air traffic control network.
The restriction, introduced at about 3:54 p.m. Eastern Time, prevented departing aircraft from taking off while aviation authorities investigated the technical problem. The measure was imposed on safety grounds amid concerns about the reliability of communications between air traffic controllers and pilots.
Transportation Secretary Sean Duffy announced that the airspace had reopened but cautioned that normal flight operations would not resume immediately. He explained that airlines would need time to reposition aircraft and crews and clear the backlog created by the disruption.
Duffy attributed the failure to outdated components within the country’s air traffic control infrastructure, particularly ageing switches and routers that became overwhelmed by data. According to his explanation, the resulting inconsistencies affected communications and radar information, making it necessary to suspend departures until the system could be stabilised.
Homeland Security Secretary Markwayne Mullin also addressed concerns that the incident could have resulted from a deliberate attack against American infrastructure. He said investigators had found no evidence of a cyberattack and dismissed suggestions that the disruption was connected to a major Microsoft-related outage reported the previous day.
Mullin described the incident as a telecommunications failure rather than a coordinated assault on the country’s aviation system. However, he indicated that security agencies were continuing to examine the circumstances surrounding the breakdown.
The disruption caused significant difficulties for passengers and airlines across the country. Thousands of flights were cancelled or delayed, while aircraft and flight crews were left out of position at airports. International services were also affected, with some flights departing from other countries experiencing restrictions linked to the American shutdown.
More than 3,000 aircraft were safely brought to the ground during the disruption, according to officials. Nevertheless, aviation tracking figures and industry reports indicated that the scale of cancellations and delays could take several days to resolve fully.
Major airports, including facilities in Atlanta, Chicago, New York and Dallas, experienced substantial disruption as passengers faced lengthy waits, revised departure schedules and uncertainty over connecting flights. Airlines advised travellers to check directly with their carriers before heading to airports.
The incident has renewed scrutiny of the condition of America’s air traffic control infrastructure, which officials and aviation experts have repeatedly identified as requiring substantial investment and modernisation.
The Trump administration has been pushing Congress to approve additional funding of approximately $30 billion for improvements to the country’s aviation system. Duffy used the disruption to highlight the risks associated with relying on outdated technology while newer systems are being introduced.
Officials also addressed questions about whether recently introduced artificial intelligence-based aviation technology contributed to the failure. Duffy maintained that the newly installed equipment was not responsible for the breakdown, pointing instead to the older infrastructure that remained in operation.
Although authorities have restored operations, the precise technical sequence that triggered the nationwide failure remains under investigation. Duffy acknowledged that he could not guarantee that similar incidents would not happen again, underscoring the need to identify the underlying weaknesses and prevent a recurrence.
The FAA’s decision to suspend departures demonstrated the safety implications of unreliable communication systems in one of the world’s busiest aviation networks. While the reopening allowed airlines to begin restoring services, passengers were warned that delays and cancellations could continue beyond Friday as the industry worked to recover.
For travellers, the immediate priority remains confirming flight schedules and maintaining contact with airlines. For American aviation authorities, the episode has intensified pressure to modernise critical infrastructure and ensure that technical failures do not again bring nationwide flight operations to a standstill.
