A computer problem at a regional air traffic control centre caused hundreds of flight delays and cancellations for several hours in the US, on Saturday.
The affected airports were among the country’s busiest; Dulles International Airport, Reagan National Airport and Baltimore-Washington International Airport, along with John F. Kennedy International Airport and LaGuardia Airport in New York.
According to FlightAware, a tracking service, over 400 flights were delayed or cancelled at an instant, at the various affected airports.
The glitch was identified by an air traffic control centre in Leesburg, Virginia, and was solved shortly after the shortcoming, returning flights back to normal.
"An FAA automation system that experienced problems earlier today is back in service," said the Federal Aviation Administration.
"FAA is continuing root cause analysis to determine what caused the problem & is working closely w/airlines to minimize impacts to travelers."
Some of the flights had been delayed for three or more hours, while others were delayed for an hour each.
Officials said that the delays had no relation to hacking or any accidents.