Delta Air Lines canceled around 427 flights Monday after its computer systems crashed worldwide, stranding thousands of passengers on a busy travel day.
That number is likely to grow. More than 1000 flights were delayed, according to flight tracking site FlightStats Inc.
About 11 hours into the outage, limited flights had resumed but widespread delays and cancelations were ongoing.
A power outage at an Atlanta facility at around 2:30 a.m. local time initiated a cascading meltdown, according to the airline, which is also based in Atlanta.
A spokesman for Georgia Power told The Associated Press that the company believes a failure of Delta equipment caused the airline's power outage. He said no other customers lost power.
A Delta spokesman said he had no information on the report.
Many passengers were frustrated that they received no notice of a global disruption, discovering that they were stranded only after making it through security and seeing other passengers sleeping on the floor.
