US air traffic control outage strands Australian travellers and grounds thousands of flights

A major communications outage across the United States has grounded flights nationwide, stranding Australian travellers and disrupting more than 11,000 journeys.

Flight Disruptions

The Federal Aviation Administration issued an unprecedented nationwide ground stop after technical problems hit air traffic control centres across the country. The order affected all 22 regional air traffic control centres responsible for guiding aircraft between airports. At least 600 flights were diverted or sent back to their departure points. The total schedule included about 11,000 flights carrying more than 1.5 million passengers that were meant to leave US airports after 4pm Eastern time on Friday. Planes already airborne were allowed to land safely, and the five-hour grounding was eventually lifted.

Traveller Impact

Australians on holiday were caught in the chaos at major hubs including New York's JFK Airport, Los Angeles International Airport, and San Diego. Adelaide resident Trish Crabb and her husband found their Delta flight from New York to Miami cancelled while trying to reach a cruise. Rivkah Brown from Victoria faced a cancelled Delta flight in San Diego after finishing a cruise, prompting her to take a ten-hour bus ride to Las Vegas instead. Sydney Airport temporarily grounded US-bound flights from Mascot on Saturday morning before resuming services and advising passengers to check with airlines.

Official Response

US Transportation Secretary Sean Duffy stated that the problem touched all Air Route Traffic Control Centres while technicians worked to find the cause. US Homeland Security Secretary Markwayne Mullin reported that early checks pointed to a telecommunications failure rather than any intentional attack. The Federal Aviation Administration defended the severe step as necessary due to safety reasons and extraordinary circumstances. Airlines are now working through a massive backlog, with international delays expected to cause global flow-on effects.

Context

This nationwide ground stop marks only the second time US flights have been completely grounded since the September 11 terrorist attacks in 2001. The previous nationwide halt occurred in January 2023 due to a computer system failure at the aviation agency. Modern air travel relies heavily on large digital and communications networks to track and space out aircraft safely.