JOSH BOAK, AP Economics Writer

WASHINGTON (AP) — Delta flights are departing and a ground stop has been lifted after a systems outage Sunday night led to departure delays and cancellations.

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In a statement posted on the Atlanta-based airline’s website at 11:45 p.m., CEO Ed Bastian apologized to customers who were impacted by this “frustrating situation.”

Delta says about 150 flights have been cancelled, with more expected.

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Bastian says this type of disruption “is not acceptable to the Delta family who prides itself on reliability and customer service.”

Delta says a waiver has been issued for travel scheduled on Jan. 29 and 30, for rebooking by Feb. 3.

In August, Delta suffered a computer breakdown after a power outage in its operations center. The airline canceled more than 2,000 flights over three days.

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