US FAA issues nationwide ground stop due to air traffic control communication issues

The Federal Aviation Administration (FAA) ordered a nationwide ground stop for all airport departures in the United States on Friday, November 14, 2026. The suspension, which lasted approximately 4 hours and 20 minutes, was triggered by communication issues within air traffic control. The FAA cited extraordinary circumstances and security reasons for the decision to halt flights. The suspension was officially lifted at 20:15 local time on Friday.

Technical causes and investigation

The communication failure specifically affected Air Route Traffic Control Centers. According to U.S. Secretary of Transportation Sean Duffy, "The system was shut down because analog network equipment became overloaded with data." This overload occurred following the introduction of new technology into the system, specifically affecting analog Time Division Multiplexing (TDM) equipment.

While the technical failure caused significant disruption, officials have addressed concerns regarding the nature of the incident. U.S. Secretary of Homeland Security Markwayne Mullin stated that there was no cyberattack and no connection to Microsoft. Although some reports have suggested conflicting views on whether a cyberattack was ruled out, officials have maintained that the issue was technical. The FBI is investigating the software update issue.

Impact on aviation and international travel

The ground stop caused significant logistical challenges for travelers and airlines. The incident resulted in a minimum of 4,000 flight cancellations and 10,000 delays across the United States. The scale of the disruption was significant, with 30,000 flights scheduled to depart in the U.S. for the remainder of the day being affected by the halt.

The United States requested that the European Union and Mexico cancel flights destined for the U.S. to manage the influx of grounded aircraft. In response to the congestion, Canada offered to receive aircraft that were unable to land at overloaded U.S. airports.

Infrastructure and funding context

This incident follows previous national flight suspensions, including a 90-minute suspension in January 2023 caused by a computer system failure, and a major suspension following the September 11, 2001, terrorist attacks. The Department of Transportation received $12.5 billion in 2025 for the purpose of air traffic control infrastructure modernization.

In light of the recent disruption, U.S. Secretary of Transportation Sean Duffy has requested $50 billion in emergency funding from Congress to address aviation needs.

Glossary

• Federal Aviation Administration (FAA) — The Federal Aviation Administration (FAA) is a US agency that regulates aircraft systems and unmanned aircraft. It also grants commercial unmanned aerial system (UAS) licenses and oversees the National Airspace System.
• Air Route Traffic Control Centers — Air Route Traffic Control Centers (ARTCC) are air traffic control facilities operated by the Air Traffic Organization (ATO). They function as part of the air navigation services within the National Airspace System.
• ground stop — A ground stop is a suspension of airport departures. It can be issued by the FAA due to extraordinary circumstances or security reasons.