FAA's Third Nationwide Ground Stop in Decades Halts All U.S. Air Traffic
On the afternoon of Thursday, November 13, the U.S. Federal Aviation Administration (FAA) ordered a nationwide ground stop — the third in recent American history. The order, issued at 4:53 p.m. Eastern Daylight Time, instructed all airports to hold departing traffic until further notice, with immediate impact on more than 45,000 daily flights crossing U.S. airspace. By 5 p.m. EST, FlightAware was tracking 12,046 aircraft still airborne, none able to take off.
What makes this event especially troubling is the cause — or rather, the lack of it. Transportation Secretary Sean Duffy confirmed on social media that there was "a communication issue impacting all Air Route Traffic Control Centers." Homeland Security Secretary Markwayne Mullin stated officials were not ruling out any cause, including a potentially malicious one, but there was no concrete evidence of criminal or terrorist activity. The FAA itself declined to comment, according to local reporting by Axios.
The scope was total: every air traffic control center in the country was affected simultaneously. International flights bound for the U.S. were handled on a case-by-case basis, while domestic departures remained on the ground indefinitely. The FAA advisory listed the ground stop window from 4:53 PM to 11 p.m. ET — a six-hour period during which no aircraft could taxi for takeoff. Accumulating delays were already spreading across all major hubs: JFK, EWR, ATL, LAX, ORD, SFO, and MIA.
Three times in history, the entire airspace closed
A ground stop of this magnitude has occurred only twice before in the last 25 years. The first was on September 11, 2001, when civilian U.S. airspace was immediately shut down following terrorist attacks on the Twin Towers and the Pentagon. The second, on January 11, 2023, when a failure in the NOTAM system (Notice to Air Missions) — the tool that alerts pilots to safety hazards — halted domestic departures for approximately nine hours, generating more than 5,000 delays and 1,300 cancellations.
The 2023 incident was caused by a corrupted file found in both the primary database and the backup, accidentally deleted by contracted personnel attempting to fix synchronization. There was no cyberattack. The lesson seems not to have been learned.
A system the GAO classifies as unsustainable
The fragility of the U.S. air traffic control system is not new. In September 2024, the Government Accountability Office (GAO) published a report warning that 75% of the FAA's 138 systems were unsustainable or potentially unsustainable. In a separate report from September 2026, the GAO assessed the Brand New Air Traffic Control System (BNATCS) program — the most ambitious modernization effort in the agency's history — and concluded that the FAA "had not developed cost or schedule analysis to support its estimates" for Phase 1, and that Phase 2 would cost an additional $10.2 billion with no target completion date.
In a September 2026 interview with Reuters, FAA Administrator Bryan Bedford admitted that "each facility operates as a silo" — individual Compaq computers (a brand discontinued by HP in 2013), analog telephone systems, and three incompatible telecommunications systems. "We're 20 years behind," Bedford said. He also revealed that the FAA uses 3D printing and even eBay purchases to obtain replacement parts for obsolete systems.
Duffy himself, the Transportation Secretary, does not hide his frustration: "These incidents will continue to happen unless we get the resources and actually build the architecture fit for the 21st century." In September 2026, after another failure — this time a severed telecom cable in Philadelphia that paralyzed the Northeast — Duffy requested an additional $30 billion to complete modernization.
Why communication is the bottleneck
Air Route Traffic Control Centers (ARTCC) are the true brains of U.S. airspace. Each one covers a vast territory — the Minneapolis center, for example, manages 330,000 square miles and nine states. When communication between these centers fails, there is no operational redundancy: each facility is essentially a single point of failure.
In August 2026, an outage at the Minneapolis center lasted about two hours, affecting more than 1,100 flights across nine states. In March, similar failures occurred in Baltimore and Newark. Today's ground stop is the expected outcome of a system operating on the thinnest copper wiring connecting decades of outdated technology to today's demand of 45,000 daily flights.
What to expect
The ground stop is expected to last until the end of the scheduled window (11 p.m. ET), meaning that hundreds of delayed flights will continue to impact the network for days afterward. When crews reach their maximum duty hours, canceled flights pile up rapidly, and recovery can take up to a week for all delays to be absorbed. The FAA has yet to release an estimate of when the system will be operational again, or what caused the communication failure.
What is certain is that, in the coming months, the FAA will likely announce new emergency measures as the BNATCS program advances — and that without massive investment and a fundamental shift in mindset regarding critical infrastructure, the next nationwide ground stop is not a matter of "if," but "when."
Sources: The Verge, CNBC, The New York Times
✓ Independent sources cross-checked and verified before publishing
