Flights in the United States were delayed on Wednesday, and airports advised passengers to check with their airlines for updates.

Flights in the United States were delayed on Wednesday, and airports advised passengers to check with their airlines for updates as the Federal Aviation Administration (FAA) worked to resolve a system failure.

The FAA stated that it was attempting to re-establish a system that notifies pilots to risks and changes to airport infrastructure and procedures that had ceased processing current data.

It also stated that it has instructed airlines to halt all domestic departures until 14:00 GMT (9:00am in US) to allow the agency to evaluate the accuracy of flight and safety information.

As of Wednesday 6:30am (11:30 GMT), more than 760 planes were delayed within, into, or out of the United States, according to flight tracking website FlightAware. Another 91 flights were also cancelled inside, into, or out of the nation.

US airline stocks dipped in premarket trade on Wednesday. Southwest Airlines fell 2.4%, while Delta Air Lines Inc, United Airlines, and American Airlines all down roughly 1%.

"Following an outage, the FAA is still working to completely restore the Notice to Air Missions system. While some services are gradually resuming, National Airspace System activities remain restricted "It was announced on Twitter.

United Airlines said it had temporarily cancelled all domestic flights and would provide an update as soon as it received further information from the FAA.

Lufthansa and Air France both indicated they will continue to fly to and from the US, although the French carrier said it was watching the situation.

According to Cirium statistics, a total of 21,464 planes with a carrying capacity of roughly 2.9 million people are scheduled to depart airports in the United States on Wednesday.

American Airlines had the most departures from US airports, with 4,819 flights booked, followed by Delta Air Lines and Southwest Airlines, as per Cirium statistics.

(investing.com, reuters.com)