Flights resume at Denver International Airport as recovery from global outage continues

Flight operations are "largely stabilized" at Denver International Airport although there are still lingering problems from an overnight global software outage. That included long lines of people trying to rebook after flights were canceled on Friday morning.

Some flights were grounded in the overnight hours and into the morning. American, Southwest and Frontier flights were operational by 7 a.m. and United and Delta flights were no longer grounded at 8 a.m. At 9 a.m. there were long lines at the United desks in the airport terminal.

"Operations have largely stabilized at DEN amid worldwide technology issues. Airline ground stops have lifted at DEN - but delays are still impacting travelers," the airport wrote on X.

Companies that rely on Microsoft 365 apps reported widespread outages, and that includes airlines across the country and across the world.

FAA and TSA operations at Denver International Airport were functioning normally.

Airport officials said it's important to check on the status of your flight if you are scheduled to depart from Denver on Friday.

"Due to third party technical issues, various airlines are impacted. Please check with your carrier before leaving for DEN," airport officials wrote on social media.

The airport briefly closed its economy parking lots overnight due to what it said on X was "ticket dispensing issues." Those issues were resolved before 6 a.m. The garages remained open.