Delta Airlines continued to struggle with the effects of a global cyber outage on Monday, cancelling more than 800 flights and leaving thousands of passengers stranded in airports.

Major airlines had canceled 874 flights and delayed 1,598 as of 5:55 p.m. Monday. according to Data from FlightAware.com shows that a total of 1,208 flights were canceled to, from or within the U.S. on Monday. More than 7,000 flights were delayed due to the same conditions.

The Atlanta-based airline was one of the airlines badly affected by Friday's CrowdStrike cyber outage. according to Reuters. (Related: CrowdStrike error sends shockwaves of chaos around the world).

Delta Air Lines has canceled more than 4,000 flights since Friday, according to Reuters. Data from FlightAware showed that Delta canceled the most flights on Monday, with China Eastern Airlines trailing far behind with 113 flight cancellations.

Delta Air Lines CEO Ed Bastian reportedly updated employees about the predicament in a video message on Monday. according to ABC News.

“It will be a few more days before we can say the worst is clearly over,” the CEO reportedly told employees. “Today will be better than yesterday, and I expect Tuesday and Wednesday to be even better.”

Delta cancels as many as 700 flights on Monday amid outages as other airlines restore service https://t.co/yGyvUI2W8u pic.twitter.com/ypjJRreA5Z

— New York Post (@nypost) July 22, 2024

Delta's chief information officer, Rahul Samant, said in the same video that the airline was having difficulty restarting two programs on Friday. One of the programs is used to assign flight attendants and pilots to scheduled flights, while the other is used to manage traffic at Hartsfield-Jackson Atlanta International Airport, Delta's largest hub, the outlet reported.

The technology outage had a major impact on many industries and businesses, halting flights, shutting down hospital systems and banks. according to Associated Press. Cybersecurity firm CrowdStrike said the problems began after a flawed update was sent to Microsoft Windows computers. Affected computers were shown an error message known as a “blue screen of death,” the Associated Press reported.