Flights across America have been grounded after nationwide technical issues.
Southwest and Delta airlines tweeted early Monday that flights across the country are experiencing delays due to technical difficulties.
Delta airlines tweeted: “We are currently experiencing a System-Wide Outage we are working diligently to get it back up and running. We do not have a specific time as yet.”
Southwest said on Twitter: “It’s affecting our flights system wide, and we’re working to see if it’s affecting any other carriers this morning as well.
“In the meantime, once more information has been made available our Agents at the airport will be happy to disseminate it to y’all.”
Both airlines are the largest carriers at Hartsfield-Jackson International Airport in Atlanta.
Delta and Southwest combined make up around 90% of traffic at the airport.
United Airlines, JetBlue Airways, and Alaska Airlines are affected, according to the Federal Aviation Administration, reports AJC.
Many passengers have reported being stuck at airports waiting for their flights, while others have sat on planes ready for take-off for up to two hours.
@ilasikorski said: “It’s been stressful sitting on a plane for 2 hours but your flight attendants are always A+ and we’re grateful!”
Southwest airlines had reportedly tried to reset the system, but the attempt had failed, according to the Wall Street Journal.
Neither airline have been able to give an estimated time as to when the system will be operating again.
The source of the technical glitch is understood to be a planning, weight and balance piece of software caused Aerodata.
One social media users claimed a pilot had said it was system that provides them with clearance paperwork to take off.
Nick Kuhn wrote on Twitter: “Sitting on a delta flight – with the same issue. Appears to be nationwide system that controls flight numbers. I suspect impacting all airlines.”
While Hillary Mintz tweeted a picture of a departure board at Mitchell Airport showing a number of cancelled flights.
Marcus Carey said: “There is a national airline flight planning system outage due to computer system problems.
“I’m in Orlando and all Southwest flights are grounded.
“The outage is affecting multiple airlines because the provider works with multiple airlines. Expect major delays nationwide.”
A statement from the Federal Aviation Administration said: “Mainline operations and regional operations are impacted to varying degrees.
“Airlines impacted included Southwest (SWA), United (UAL), JetBlue (JBU), Alaska (ASA) and Delta (DAL).”
United Airlines said: “It appears that we are experiencing an outage that is impacting our ability to create release paperwork, Katie. We know this is frustrating, and we will get you in the air as quickly as possible.”