US Air Travel Disrupted as Technical Glitch Triggers Nationwide Flight Grounding

Thousands of flights cancelled as US authorities reveal the cause of a major air traffic control system failure.

The United States experienced widespread air travel disruption on Friday after a technical malfunction in its air traffic control communications network prompted a four-hour suspension of flights, leaving thousands of passengers stranded and causing extensive delays and cancellations across the country.

On Saturday, US Transportation Secretary Sean Duffy revealed that the disruption occurred during an upgrade of the nation's air traffic control infrastructure, as ageing copper wires were being replaced with high-speed fibre-optic cables.

According to Duffy, the malfunction affected aircraft communication systems and radar data transmission, with the problem subsequently spreading to other routers within the air traffic control network. He indicated that the failure may have resulted from either a contractor's error during the upgrade process or faulty equipment.

Federal Aviation Administration (FAA) Administrator Bryan Bedford confirmed that approximately 12,000 flights were cancelled on Friday, while a further 4,000 to 5,000 cancellations were anticipated on Saturday, out of approximately 41,000 scheduled flights.

Speaking at a press conference in Washington, Bedford apologised to affected passengers and expressed optimism that air traffic operations would return to normal by Sunday.

According to flight-tracking platform FlightAware, at least 5,000 flights had already been cancelled by Saturday afternoon, highlighting the continuing impact of the disruption on the country's aviation network.

The nationwide ground stop was lifted at 8:15 p.m. Eastern Time on Friday, following a four-hour suspension. However, despite the gradual resumption of flights, several major airports continued to experience significant operational challenges.

New York's John F. Kennedy International Airport and LaGuardia Airport were among the facilities affected, with passengers facing repeated delays, unexpected cancellations and uncertainty over departure schedules.

Scenes from airports across the country showed crowded boarding gates and frustrated travellers, some of whom were required to disembark from aircraft before departure as airlines struggled to manage the disruption.

The incident has brought renewed attention to the importance of modernising the United States' aviation infrastructure and ensuring the reliability of critical communication systems that support one of the world's busiest air transport networks.