6,000+ US flights affected Saturday as airlines recover from outage

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Bailey Bardrick’s trip is not going as planned – in fact, it may not be going at all.
As airlines continue to grapple with the fallout from Friday’s global IT outage, thousands of flights have been canceled or delayed.
For Bardrick, a feeder flight from Northwest Arkansas to Atlanta was canceled, meaning she couldn’t make her onward connections to Honolulu and Tokyo.
“I didn’t even get past security. The app popped up that it was canceled,” she told USA TODAY, and she’s still not sure when she’ll be able to get underway.
“I invested a couple thousand into this trip. I’ve been planning it for a while and it’s frustrating to not have any answers on when the next flight is,” she said.
According to the Federal Aviation Administration, several U.S. carriers, including American Airlines, United Airlines, and Delta Air Lines, issued ground stops for all their flights early on Friday due to communication problems, which caused a domino effect into Saturday.
There were over 1,600 flights canceled and more than 4,900 delays as of 3 p.m. ET Saturday, according to flight-tracking website FlightAware. Delta and United Airlines have been hit the hardest with 821 and 379 cancellations so far, respectively. Endeavor Air, a wholly-owned regional subsidiary of Delta has also seen significant cancellations.
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The cybersecurity firm Crowdstrike blamed the global tech outage on a defect in an update for Microsoft Windows hosts.
“Today was not a security or cyber incident. Our customers remain fully protected,” Crowdstrike CEO George Kurtz posted Friday on X. “We understand the gravity of the situation and are deeply sorry for the inconvenience and disruption. We are working with all impacted customers to ensure that systems are back up and they can deliver the services their customers are counting on. As noted earlier, the issue has been identified and a fix has been deployed. There was an issue with a Falcon content update for Windows Hosts.”
The aviation sector was hit particularly hard due to its sensitivity to timings. Airlines rely on a closely coordinated schedule often run by air traffic control. Just one delay of a few minutes can throw off a flight schedule for take-offs and landings for an airport and airline for the rest of the day.
“The issue affected many separate systems, such as those used for calculating aircraft weight, checking in customers, and phone systems in our call centers,” United Airlines said in a statement Friday. “After pausing all departures overnight, flights resumed on Friday morning and we are working diligently to get our customers to their destinations.”
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The FAA will issue ground stops and other precautionary flight control measures as needed, but most of the cancellations and delays Saturday are likely to be caused by airline crews and equipment being out of place.
“The airline industry is very thinly populated with planes. Once they’re out of place, they can’t run their normal playbook because their planes are not in place to run their route,” Jon Haass, a professor of cyber intelligence and security at Embry-Riddle Aeronautical University-Prescott, told USA TODAY. “It’s not just one piece of software anymore, it’s an entire system.”
Travelers are advised to contact their airlines and monitor the FAA’s website for the latest information.
Customers can ask airlines why their flight is canceled or delayed, but the Department of Transportation confirmed that it considers the delays and cancellations caused by Friday’s IT outage to be “controllable” by the airlines. While airlines may say they didn’t cause the computer error, it means that the DOT will hold them responsible for upholding the commitments they’ve made to customers when it comes to policies like rebooking or hotel and meal vouchers as the mess gets sorted out. Every airline’s policy is outlined on the DOT customer service dashboard. 
The Bureau of Transportation Statistics also tracks causes of delays and cancellations.
Airlines are doing what they can to provide extra flexibility to those affected by the outage.
Department of Transportation rules require all airlines to offer customers a refund if their flights are canceled for any reason, but customers may be entitled to additional compensation if a cancellation is within the airline’s control.
If your flight is experiencing a long delay, the Transportation Department suggests asking airline staff if they will pay for meals or a hotel room.
The DOT dashboard reflects airlines’ official policies, but many carriers handle compensation for delays on a case-by-case basis and may provide vouchers or other benefits in some situations that are not formally covered.
Each airline defines significant delays differently, but the DOT’s dashboard identifies which airlines provide compensation for controllable delays of 3 or more hours.
For instance, all major U.S. carriers are supposed to provide a meal voucher for flights delayed by at least 3 hours for reasons within their control. Additionally, Alaska, JetBlue and Southwest offer credit or a travel voucher when a controllable delay “results in passenger waiting for 3 hours or more from the scheduled departure time,” according to the dashboard.
Travelers seeking monetary compensation for delayed flights should file a claim with their respective airlines. Passengers seeking other types of compensation, like frequent flyer miles, may be able to request those through the airline’s customer service.