Delta Cancellations Extend Into Monday as Airlines Deal With Effects of Tech Outage

The air travel industry is still feeling the impacts of Friday’s global tech outage, with some airlines like Delta (DAL) canceling and delaying more flights into Monday morning.

A software update from cybersecurity company CrowdStrike (CRWD) caused disruptions across Microsoft (MSFT) platforms Friday, disrupting a wide range of industries from banking to air travel, with thousands of flights canceled across the globe.

Delta More Impacted Than Other Large Airlines

Delta was more heavily impacted than many other airlines, having canceled 17% of its flights and delayed 5% so far Monday morning, far more than United (UAL) and American (AAL), according to data from the flight tracking website FlightAware.

“One of our crew tracking-related tools was affected and unable to effectively process the unprecedented number of changes triggered by the system shutdown. Our teams have been working around the clock to recover and restore full functionality,” Delta CEO Ed Bastian said in a statement Sunday.

The outage came amid a summer travel season that has seen high demand, with air travel over the Independence Day holiday setting TSA records. Bastian said the outage came at a particularly difficult time for Delta, as the weekend was set to be the company’s busiest of the summer so far, with over 90% of seats filled.

Delta shares were 1% lower at $45.44 in pre-market trading Monday after rising about 1% Friday despite the outage.