All flights across the US have been suspended due to a glitch with the Federal Aviation Administration's computer system.
In a statement to NBC, the FAA said: "The FAA is working to restore its Notice to Air Missions System. We are performing final validation checks and repopulating the system now. Operations across the National Airspace System are affected.
"We will provide frequent updates as we make progress."
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According to reports, officials at the Federal Aviation Administration first reported a system failure on January 10 and it has yet to be resolved.
The Air Traffic Control System Command Center has warned passengers they could be in for a long wait with no estimate to when things will be back up and running again.
A message on its website reads: "The NOTAMS outage continues with no current estimate time of restoration. A hotline has been activated."
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The halting of all flights have sent travel plans of passengers into disarray.
Frustrated airline passengers have taken to Twitter to vent about the situation, with one person writing: “Update from our United pilot - The down system doesn't let him check flight plans and follow federal regulations. According to people here at DCA airport, it's a regulatory gray area if they can fly. Putting safety first, they are grounding flights until FAA fixes the system."
Another wrote: “Gotta love when you book a 6 am flight trying to avoid travel delays, but due to a nationwide FAA system issue the flight is delayed anyway. Going to be a long day.”
And a third concerned would-be traveller, said: “In Charles de Gaulle Airport in Paris. Airline just informed us that the FAA computers are down in the US and no flights are flying to America.”
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Someone else tweeted: “Anyone one else stranded? Our @united [pilot] says there is a nationwide outage of FAA @FAANews computer systems.”
A notice on the FAA website currently reads: "Technicians are currently working to restore the system and there is no estimate for restoration of service at this time.
"Since then no new NOTAMS or amendments have been processed."
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Date from FlightAware shows that at least 400 flights have been delayed into, out of or across the United States as of 5.31am ET, which means there's set to be plenty of angry passengers out there.
As yet the FAA has not announced when the issue will be fixed.
Topics: US News
Claire Reid