Delta Airlines Inc experienced what it called a “major system-wide network outage” on Monday which delayed flights worldwide and said technicians were working to resolve the computer problem as soon as possible.
Flights scheduled for departure were not taking off, but those already in the air were operating normally, Delta said in a statement.
Delta operates 5,000 departures a day and is a member of the SkyTeam alliance alongside airlines including Air France-KLM.
“Delta experienced a computer outage that has impacted flights scheduled for this morning,” said Delta, the world’s second largest airline measured by revenue passenger kilometres flown.
“Our systems are down everywhere. Hopefully it won’t be much longer,” the airline said on Twitter.
The outage was affecting flights globally, a London-based spokeswoman for the airline said.