Air traffic in the United States has been severely affected by a system outage according to the US Federal Aviation Administration.
US flights grounded amid FAA system outage
US flights have been grounded or delayed as the Federal Aviation Administration scrambles to fix a system outage, with passengers told to check with airlines for updates.
The FAA said it had ordered airlines to pause all domestic departures until 9am ET to allow the agency to validate the integrity of flight and safety information.
Flights already in the air were allowed to continue to their destinations.
The FAA said it was working to restore a system that alerts pilots to hazards and changes to airport facilities and procedures that had stopped processing updated information.