All Delta Air Lines flights are grounded due to a computer outage, the airline said Monday as it sought to bring under control a problem that threatened to strand thousands of travelers.
"Flights awaiting departure are currently delayed," the US-based company said in a statement on its website Monday. "Flights en route are operating normally."
The airline urged passengers to check the status of flights while the company works to fix the problem. However, it didn't provide an expected time frame for when the flight schedule would return to normal.
Passengers at several airports around the US complained via Twitter about being stuck on planes at departure gates, while some who had already boarded flights were being asked to exit the planes.
One customer asked on Twitter if he should go to a Florida airport to catch a flight on time.
"Hopefully by the time you arrive, we will be up and running," the airline replied. "Let's keep our fingers crossed."