US FAA Lifts Nationwide Ground Stop Following Telecommunications and Radar System Instability

The Federal Aviation Administration (FAA) lifted a nationwide ground stop for flights in the United States on Saturday, November 14, 2026, at 20:15 local time. The disruption lasted approximately five hours and began around 9:00 PM UK time on Friday. The ground stop was triggered by instability in communication and radar systems involving legacy equipment, leading to significant delays and cancellations for travelers in the United States and the United Kingdom.

Causes and Official Responses

According to officials, the technical failure was caused by a telecommunications communication issue, including a data overload on a router. US Secretary of the Department of Transportation Sean Duffy stated that the grounding was due to a communication issue impacting all Air Route Traffic Control Centers and was not linked to the new AI system. US Secretary of Homeland Security Markwayne Mullin said the disruption was caused by updates to legacy systems and there is no evidence of a cyberattack.

The scale of the technical failure impacted air traffic control operations significantly. Aviation safety expert and former United Airlines pilot Steve Arroyo said the nationwide scale of the issue prevented controllers from reliably communicating with pilots. Before resuming flight operations, the FAA conducted system testing to ensure stability.

Impact on Travel and Sports

The disruption resulted in widespread cancellations and delays. While exact figures vary between different tracking services, reports indicate that thousands of flights were affected. According to Flightradar24, American Airlines cancelled flights to Los Angeles, Chicago, and New York, while Delta Air Lines cancelled a flight to Atlanta. Flightradar24 reported that 2,200 flights were cancelled by American Airlines and 2,200 flights were cancelled by Delta Air Lines. Other reports suggest that 10,000 flights were cancelled to and from US airports through Saturday.

The disruption also affected professional and collegiate sports schedules. The disruption caused delays for NBA and NHL teams, as well as college sports teams. Specifically, the Southeastern Conference (SEC) rescheduled several matches to Sunday due to flight disruptions. US Secretary of the Department of Transportation Sean Duffy noted that college football teams using charters could be given priority to ensure games proceed.

International travel also faced consequences. Manchester Airport reported likely slight delays for three Virgin Atlantic flights scheduled for Saturday, while Edinburgh Airport reported expected delays for inbound and outbound flights.

Historical Context

This event represents the first nationwide ground stop in the United States since the September 11, 2001, terrorist attacks. This incident follows previous technical issues in the region, including a similar air traffic control communication issue in the northeast US two months prior, which was linked to a cut fiber optic line. Additionally, a radar outage occurred last year at Newark airport due to aging equipment.

Glossary

• Federal Aviation Administration (FAA) — The Federal Aviation Administration (FAA) is a US agency that oversees the National Airspace System. It is responsible for conducting system testing to ensure stability and managing flight operations.
• Air Route Traffic Control Centers — Air Route Traffic Control Centers are air traffic control facilities. They are operated by employees within the Air Traffic Organization (ATO).
• Southeastern Conference (SEC) — The Southeastern Conference (SEC) is a conference that includes college sports teams.