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

In a statement posted on the Atlanta-based *******’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.

Bastian says this type of ********** “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 centre. The ******* cancelled more than 2,000 flights over three days.