CHICAGO (WLS) — A global IT outage is impacting airlines, airports, banks and media companies Friday morning.

The issue is impacting apps and servers for Microsoft 365.

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Crowdstrike, the U.S. cybersecurity company, has admitted to being responsible for the error and are working to correct it.

At O’Hare Airport, the outage is impacting major airlines, including American, Delta, United, Allegiant and Frontier. Display screens that typically show flight information were showing blue screens.

American Airlines, Allegiant and Spirit have canceled their ground stops, but Delta and United are still impacted. Delta and United said they have resumed some flights.

As of 6:54 a.m., over 1,000 flights have been cancelled in the U.S.

Conditions remained calm at O’Hare airport early Friday.

Passenger Troy Owens was flying from San Diego into Chicago for a basketball tournament. His Frontier flight was canceled, but he was able rebook and make it into Chicago.

Owens said it was, “Frustrating at first but we are rolling with the punches.”

Passengers flying Southwest Airlines at Midway Airport were not having any trouble with their flights. Some passengers traveled from O’Hare to Midway to try and book a flight.

American Airlines has lifted its ground stop. They released a statement saying, “Earlier this morning, a technical issue with a vendor impacted multiple carriers, including American. As of 5 a.m. ET, we have been able to safely re-establish our operation. We apologize to our customers for the inconvenience.”

Delta said in a statement, “Delta has resumed some flight departures after a vendor technology issue impacted several airlines and businesses around the world. That issue necessitated a pause in Delta’s global flight schedule this morning while it was addressed. Additional delays and cancelations are expected Friday. Delta has issued a travel waiver for all customers who have booked flights departing Friday, July 19. It allows customers to manage their own travel changes via delta.com and the Fly Delta app. The fare difference for customers will be waived when rebooked travel occurs on or before July 24, in the same cabin of service as originally booked. If travel is rebooked after July 24, any difference in fare between the original ticket and the new ticket will be collected at the time of booking.”

Metra said some trains were operating with delays as a result of the Microsoft outage.

CTA, and the Illinois Department of Transportation said they were not impacted. Chicago police said they have intermittent computer issues, but there is no impact for 911 and dispatcher service.

Workers at Starbucks told ABC7 that in-store transactions are being processed but there are problems with mobile orders.