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FAA Grounds All US Flights Due to Telecommunications Outage

FAA Grounds All US Flights Due to Telecommunications Outage

First seen 13 Nov 2026, 22:17 UTC • •
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ThreatCluster AI
ThreatCluster •November 14, 2026 at 07:27 UTC
  • •FAA grounded all US flights due to a telecommunications outage affecting air traffic control.
  • •Over 7,000 flights were canceled and about 10,000 delayed, impacting millions of passengers.
  • •Officials confirmed no evidence of a cyberattack or connection to recent Microsoft outages.

On November 13, 2026, the Federal Aviation Administration (FAA) issued a nationwide ground stop for all departing flights due to a telecommunications outage affecting air traffic control centers. This unprecedented measure, only the second since the September 11 attacks, resulted in over 7,000 flight cancellations and approximately 10,000 delays, stranding millions of passengers. Transportation Secretary Sean Duffy attributed the outage to outdated technology, specifically overloaded routers and switches. Homeland Security Secretary Markwayne Mullin confirmed there was no evidence of a cyberattack or nefarious activity, despite initial concerns linking the outage to a recent Microsoft service disruption. The ground stop lasted for about four hours, with operations gradually resuming afterward, but significant delays are expected to continue as airlines work to restore normal schedules.

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Timeline

2026-11-13
FAA issues nationwide ground stop
The FAA grounded all flights due to a telecommunications outage affecting air traffic control centers.
TechRepublic
2026-11-13
Transportation Secretary addresses the outage
Sean Duffy attributed the outage to outdated technology and overloaded routers, urging Congress for funding to modernize the system.
Aljazeera
2026-11-13
Ground stop lifted
The FAA lifted the ground stop after approximately four hours, but significant delays continued as airlines worked to resume operations.
CNN

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Common questions

What caused the FAA ground stop?
The ground stop was caused by a telecommunications outage affecting air traffic control centers due to overloaded routers.
Is there any evidence of a cyberattack?
No, officials confirmed there is no evidence suggesting a cyberattack or nefarious activity related to the outage.
How long will delays continue?
Delays are expected to persist as airlines work to restore normal operations, potentially affecting travel for several days.