SEATTLE - Delta Airlines experienced a systems outage Sunday that delayed and cancelled flights across the country.
The Atlanta-based airline said the delays were due to "automation issues."
At least 150 flights were cancelled . Delta said they expect that number to grow.
Several flights were affected at Sea-Tac Airport. Flights already in the air at the time of the outage were not affected.
In a statement Sunday night, Delta apologized for the inconvenience to customers and said they were working to address the issue as quickly as possible.
“I want to apologize to all of our customers who have been impacted by this frustrating situation,” said Delta CEO Ed Bastian. “This type of disruption is not acceptable to the Delta family who prides itself on reliability and customer service."
International flights were exempt from the grounding, the FAA said.