Delta Air Lines encounters major disruptions due to cyber outage fallout

Delta Air Lines is still grappling with major operational issues after last week’s worldwide cyber outage, which has led to the cancellation of more than 600 flights just on Monday, on top of the 4,750 flights already cancelled. The disruption stems from a flawed software update by cybersecurity company CrowdStrike, leaving thousands of passengers stranded and significantly hampering Delta's crew tracking system.

Delta Air Lines encounters major disruptions due to cyber outage fallout
Delta Air Lines is facing substantial operational difficulties following a global cyber outage that occurred last week, leading to the cancellation of over 600 flights on Monday. This is in addition to the 1,250 flights that were canceled on Sunday and the 3,500 that were previously affected.

Thousands of passengers are now stranded across the United States. Some have taken to renting cars for long drives, while others are dealing with prolonged delays or outright trip cancellations.

As of Monday, approximately 16 percent of Delta's flights had been canceled, according to FlightAware, out of an estimated 1,100 flights to or from the U.S. The incident has heavily impacted the Atlanta-based airline, particularly its crew tracking system. Since last Friday, more than 5,000 flights have been canceled in total.

Delta has yet to provide a specific timeline for when normal operations will resume.

The issues originated from a software update by cybersecurity firm CrowdStrike, which caused system problems for Microsoft customers, including several airlines. While most U.S. carriers have managed to recover, Delta continues to face challenges. United Airlines, for example, canceled 9 percent of its Sunday flights, totaling 266, the second-highest among airlines.

Delta CEO Ed Bastian communicated with customers via email, stating that the crew tracking system was notably disrupted, unable to handle the volume of changes required after the system shutdown. He also informed employees that Delta would make tactical adjustments to schedules to ensure safety.

Transportation Secretary Pete Buttigieg has spoken with Bastian, stressing Delta's responsibilities to its passengers and the role of the Department of Transportation in enforcing these obligations. Buttigieg reassured passengers that the department would enforce all relevant passenger protections and noted that it had received numerous complaints.

"No one should be stranded at an airport overnight or stuck on hold for hours," he said.

CrowdStrike indicated that many of the 8.5 million affected Microsoft devices were back online, but Delta's recovery process is still in progress.

(With input from Reuters)

Camille Lefevre contributed to this report for TROIB News