Delta operations returning to normal after systems outage

In this Thursday, May 15, 2014, file photo, a Delta Air Lines Boeing 757-232 lands at the Tampa International Airport in Tampa, Fla. (AP Photo/Chris O'Meara, File)

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.

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. Delta tweeted Monday morning that customers traveling today should check their flight status at delta.com and the Fly Delta app.

Some flights in and out of the Gerald R. Ford International Airport were cancelled or delayed.

>>Online: Real-time flight information for Ford Airport

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.