RALEIGH (WTVD) --
If you have a flight on Delta Air Lines today, you might want to check your flight status.
The airline has grounded flights and predicted widespread cancellations Monday after a power outage hit its computer systems globally, disrupting the travel plans of thousands of passengers.
The Atlanta-based carrier said in a statement that the outage began at around 2:30 a.m. Eastern. Flights which were already en route were operating normally, but many passengers took to Twitter to express frustration with being stuck on the ground.
"We are aware that flight status systems, including airport screens, are incorrectly showing flights on time," the company said in a statement. "We apologize to customers who are affected by this issue, and our teams are working to resolve the problem as quickly as possible."
Confirmation of the troubles first came in an official account that responds to customers via Twitter. The company had said its IT systems were down "everywhere" and "hopefully it won't be much longer."
Several applications were affected, including the company's website. Delta said it is offering a waiver to customers who are affected.
At RDU, long lines snaked around the ticket counters early Monday morning as travelers said the airline did not alert them about the outage before they headed to the airport.
In June, Delta Air Lines had the most passengers at RDU, accounting for more than 29 percent of all traffic.
Among those affected by the situation was a woman heading to St. Lucia for her honeymoon. She said she was worried because the newlyweds only have a couple of days to enjoy the island.
Airline data company Flightaware said there were at least 858 cancellations and 7,359 delays across the global industry on Monday morning. It's unclear how many are related to Delta's problems and whether Delta's groundings are reflected in the numbers.
Computer outages have caused major headaches for airlines and travelers before. Southwest Airlines was forced to cancel more than 2,000 flights across the U.S. last month after technology problems prevented many travelers from checking in or boarding flights