Thousands of passengers across the United States faced travel chaos after the Federal Aviation Administration (FAA) imposed a nationwide ground stop on Friday, November 13, following communication problems at air traffic control centres. Although the restrictions were lifted later that evening, the disruption continued into Saturday, with more than 2,500 flights cancelled and hundreds more delayed as airlines struggled to restore normal operations.
The shutdown, which lasted more than four hours, was the longest nationwide flight ground stop in 25 years.
The disruption began after communication and radar-related problems affected the US air traffic control network.
According to US officials, new technology being introduced into the country's air traffic control system overloaded older equipment, resulting in intermittent communication and radar gaps.
Transportation Secretary Sean Duffy said that the system experienced instability involving its switches and routers, which began producing inconsistent data.
The FAA imposed the ground stop as a precautionary safety measure, preventing departing flights from taking off while the issue was being addressed.
The disruption affected all 22 regional air route traffic control centres responsible for guiding aircraft between airports.
The FAA lifted the nationwide ground stop at approximately 8:15 pm Eastern Time on Friday.
However, lifting the restriction did not mean airlines could immediately return to normal operations.
Aircraft and crew members were left out of position, while passengers faced cancellations, missed connections and extended waiting times.
According to flight-tracking data cited by Reuters, nearly 10,000 flights had been cancelled by late Friday night. More than 2,500 additional cancellations were reported on Saturday as airlines continued dealing with the backlog.
Airlines warned that the disruption could take time to clear, with officials expecting operations to recover gradually.
The incident also raised questions about the vulnerability of America's aviation infrastructure.
Homeland Security Secretary Markwayne Mullin said there was no indication that a cyberattack had caused the disruption. Officials described the problem as appearing to be mechanically driven, although investigations were continuing.
Questions were also raised about whether the FAA's new AI-powered air traffic management technology was involved.
Transportation Secretary Sean Duffy said the failure was linked to older legacy equipment and not the new AI system being introduced to help manage air traffic.
The incident has once again drawn attention to the ageing technology supporting America's aviation network.
The US government has been working to modernise its air traffic control infrastructure, including replacing outdated copper wiring with fibre-optic lines and upgrading radio communication systems.
Congress had previously approved $12.5 billion for modernisation efforts, while the Trump administration is seeking an additional $30 billion to complete the overhaul.
Officials have acknowledged that further disruptions cannot be ruled out as the system undergoes upgrades.
For millions of travellers who depend on the country's aviation network, Friday's shutdown was a reminder that even a highly developed aviation system can face major disruption when its underlying infrastructure fails.
The flights are back in the air, but the bigger question remains: how prepared is America's aviation infrastructure for the future?