The Federal Aviation Administration (FAA) in the United States enforced a nationwide suspension of all outbound flights on Friday, citing "extraordinary circumstances and safety reasons," according to the Associated Press. This decision, which took effect around 3:54 p.m. Eastern Time, impacted the country's 22 regional air traffic control centers.
Homeland Security Secretary Markwayne Mullin addressed the media from the White House grounds to quell public concerns that arose immediately. "This is not another 9/11—I simply cannot emphasize that enough. People are making that assumption. This is a telecommunications disruption. It is distinctly different," he stated.
Mullin affirmed that President Donald Trump was briefed on the situation and that the government is in "full crisis response mode." "There is no reason for the public to be afraid," he reassured, adding that all in-flight planes have been accounted for and are being managed individually.
Transportation Secretary Sean Duffy traced the issue back to a communications failure affecting all route control centers at once, with FAA technicians actively investigating. The reported failures disrupted radio frequencies and, in some cases, radar systems, with initial reports coming from Chicago, New York, and Boston before spreading nationwide.
When asked about the possibility of a cyberattack, Mullin was cautious: "We're not ruling anything out at this point. Our first priority is ensuring everyone's safety." He also announced that the government is investigating whether a new AI-based air traffic control system, being implemented that day, is related to the disruptions. "We're looking into that. It's part of what we're reviewing through CISA at the Department of Homeland Security," he noted, referring to the cybersecurity agency.
The operational impact was significant: around 7,000 flights were either delayed or canceled, according to FlightAware, while Flightradar24 recorded approximately 4,042 aircraft en route to U.S. airports when the order was issued.
Former United Airlines pilot and aviation expert Steve Arroyo remarked that the incident is reminiscent of a regional communications outage last September that affected the Northeast, but this time on a national scale. Arroyo linked it to the outdated technology used by the FAA: "If you lack that capability, whether because the old wires they have are simply deteriorated or for any other reason, you have to ground the planes. You can’t put them in the air where there's a risk of losing communication with them."
This marks the first complete halt of U.S. airspace since January 2023, when a NOTAM system failure—responsible for distributing critical safety information before takeoff—caused nearly 9,000 delays and 1,300 cancellations. Prior to that, the only precedent was the airspace shutdown following the September 11, 2001 attacks.
The FAA's operational advisory initially allowed for an expiration time of 11 p.m. Eastern Time, indicating a minimum duration of approximately seven hours. However, Mullin cautioned that it was "too soon" to discuss concrete timelines: "This will not be resolved and turned around in an hour. It's going to take time."
FAQs about the Nationwide Flight Suspension
What caused the nationwide suspension of flights in the U.S.?
The suspension was due to a telecommunications disruption impacting all route control centers, with reported failures affecting radio frequencies and radar systems.
How did the government respond to the flight halt?
The government entered full crisis response mode, with Homeland Security and Transportation officials actively investigating the cause and ensuring public safety.
Is there a possibility of a cyberattack being involved?
While the possibility of a cyberattack has not been ruled out, the primary focus is on resolving the telecommunications disruption and ensuring safety.
How many flights were affected by the suspension?
Approximately 7,000 flights were delayed or canceled, and about 4,042 aircraft were en route to U.S. airports when the order was issued.