EAST ELMHURST, Queens — Delta Airlines is working to resume normal operations after planes were grounded for six hours Monday morning.
According to Delta, a power outage at the Atlanta hub caused a global computer systems outage at 2:30 a.m.
Flights across the world were cancelled.
The airline said planes already in the air were able to land safely until they were able to resume operations at 8:40 a.m.
But widespread delays and cancellations plagued the airline and passengers.
Delta's CEO Ed Bastian released a video on Twitter Monday afternoon.
"I apologize for the challenges this has created for you with your travel experience. The Delta team is working very, very hard to restore and get these systems back as quickly as possible," Bastian said.
Fliers at LaGuardia Airport watched the departure screens, hoping their planes were going to take off.
Manhattan resident Clint Studinger may have to sleep in Atlanta Monday night. He is trying to get to Wisconsin. "I have an early morning meeting in Green Bay," he said.
Queens resident Danielle Doda tried to remain calm.
"What are you going to do, it's travel," she said.
Delta said it is offering vouchers for people who were unable to fly. Rebooking fees have been cancelled.
A Georgia Power spokesperson told The Associate Press that the company believes a failure of Delta equipment caused the power outage. No other customers lost power.
According to Delta, following the power loss, "some critical systems and network equipment didn't switch over to Delta's backup systems. Delta's investigation into the causes is ongoing."