Delta Air Lines passengers across the U.S. and Europe faced widespread disruption Friday morning after a major computer outage forced all Delta departures at Detroit Metropolitan Airport to grind to a halt one of the airline’s largest and most critical hubs.
The trouble began around 5 a.m. local time, when the FAA issued an immediate ground stop at Delta’s McNamara Terminal, citing a system failure severe enough to prevent the carrier from safely dispatching flights. Initially, officials believed the halt could be lifted by 7 a.m., but within an hour the advisory was extended to 9 a.m., and the FAA warned there was a 60 percent chance the shutdown could last even longer.
This left thousands of passengers stranded in terminals, on the tarmac, or trapped in security lines with no information. Travelers described computer screens across the terminal going dark, airport signage resetting to blank blue or black screens, and a total absence of gate agents many of whom were unable to log in to Delta’s internal systems. Flight crews were reportedly standing idle in concourses, unable to receive assignments or updated instructions.
Although the outage paralyzed Delta’s operations, it did not impact other airlines at Detroit’s airport. This created the unusual scenario of Delta gates at a standstill while nearby carriers continued operating normally.
Transatlantic disruption: Delta jet forced to abandon landing in Scotland
Simultaneously, Delta was hit with a second crisis overseas. A separate technical failure in the U.K.’s air-traffic control network forced a Delta Boeing 767 operating Flight 208 from New York to divert to Dublin.
The aircraft was approaching Edinburgh on Friday morning and began its descent around 9 a.m. local time. When air-traffic control systems unexpectedly failed, all takeoffs and landings at Edinburgh Airport were suspended. The Delta flight circled the city for nearly 20 minutes as controllers attempted to restore communications, but eventually the crew was instructed to divert, landing in Dublin shortly after 10 a.m.
Edinburgh Airport later confirmed on X:
“Due to an IT issue with our air traffic control provider, no flights are currently operating.”
This suspension lasted roughly two hours before limited operations resumed.
Possible connection to massive Cloudflare outage
These aviation problems unfolded just hours after Cloudflare one of the backbone providers behind global internet performance and security—experienced a widespread outage that temporarily disrupted major websites and digital services worldwide. The Cloudflare event was severe enough that some online trackers described it as taking down “half the internet.”
Although Delta has not confirmed whether its failures were linked to Cloudflare, outage mapping sites like Downdetector showed a steep spike in Delta-related disruptions, particularly affecting:
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Website functionality
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Mobile app access
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Online check-in
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Digital boarding pass retrieval
Delays surge into the thousands of minutes
FAA metrics captured how rapidly the situation deteriorated. Total minutes of delay attributable to the Detroit ground stop reportedly surged from about 1,400 minutes to more than 3,800 minutes early Friday. By 8 a.m., Detroit alone had logged:
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64 delays
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49 cancellations
Systemwide, FlightAware reported:
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716 delays
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100 cancellations
These numbers were still climbing as Delta worked to bring its systems back online.
Passengers describe a “communication blackout”
Travelers caught in the chaos took to Reddit, X, and TikTok to express frustration. Many said they received no announcements, no text alerts, and no information from Delta staff.
One Reddit user wrote:
“Stuck on the tarmac on the east coast waiting for whatever is going on in Detroit to get resolved so our plane can take off… sounds like the pilot was surprised too.”
Another described the terminal as eerily silent:
“All computers are blank. No gate agents anywhere. Pilots and flight attendants just standing around. No announcements. No updates. Nothing.”
Several passengers reported that even Delta’s internal clocks and departure boards had frozen, making it impossible to tell when or if flights would resume boarding.
UK airport hit with similar chaos
Across the Atlantic, Edinburgh Airport struggled with its own hours-long shutdown. The BBC reported that the airport halted all movement around 8:30 a.m. local time. Although only a limited number of flights were canceled outright, almost one-third of scheduled departures were delayed due to the backlog.
Thousands stranded as Delta works to recover
With two major IT incidents unfolding on opposite sides of the ocean, Delta faced significant strain on its international and domestic operations. Detroit—one of Delta’s three largest global hubs—serves as a central artery for connections across the Midwest, East Coast, and Asia. A full ground stop at DTW can ripple across the entire Delta network within hours.