Delta Warns Cancellations to Stretch for Days After Outage (2)

Delta Air Lines Inc. expects to cancel more flights this week as the carrier tries to recover from a crippling technology outage.

The airline grounded nearly 900 flights as of Monday afternoon, bringing its total since Friday’s meltdown to almost 4,700. Delta said it was working “around the clock” to restore operations, with more than half of its worldwide IT relying on Microsoft Corp.’s Windows operating system affected by the software error.

Chief Executive Officer Ed Bastian said it could be days before Delta moves past the incident, according to a video message sent to employees Monday.

Delta has ...