Flights across US grounded after major system failure

There was no immediate estimate for when it would be back, the website showed, though NOTAMs issued before the outage were still viewable.

Washington, Jan 11: Flights across the United States have been grounded due to a glitch with the Federal Aviation Administration's computer system, news reports said on Wednesday.

Over 1,200 flights to, from, and within the United States delayed as of 6.45 am ET while 93 flights has been cancelled, reports CNN.

Flights are reportedly delayed at various airports including Philadelphia, Tampa and Honolulu and also Ronald Reagan Washington airport in Arlington, Virginia.

The FAA said it suffered an outage of its system that alerts pilots and crew to advisories and information for flights.

"US Federal Aviation Administration's (FAA) system that alerts pilots and other flight personnel about hazards or any changes to airport facility services and relevant procedures was not processing updated information, US civil aviation regulator's website showed," reports Reuters.

United States FAA said it is working to restore its Notice to Air Missions System.

"We are performing final validation checks and reloading the system now. Operations across the National Airspace System are affected. We will provide frequent updates as we make progress." tweeted US Federal Aviation Administration.

The FAA is still working to fully restore the Notice to Air Missions system following an outage. While some functions are beginning to come back on line, National Airspace System operations remain limited," the FAA said in another tweet.

While the FAA has not enforced a grounding of aircraft due to the outage, most airlines have chosen to ground their own plane due to the system's failure.

The outage comes as a result of the failure of the Notice to Air Missions system, which alerts pilots and other personnel about airborne issues and other delays at airports across the country.

"The NOTAMS outage continues with no current estimated time of restoration. A hotline has been activated," a message on the website warned passengers.