Archive · 8 Aug 2025
United Airlines Resolves Tech Issue, Delays Continue
United Airlines had a computer problem, causing delays and cancellations for many flights.
This issue came from a system called Unimatic, which is used to manage flight information.
Many flights were delayed on Wednesday.
The airline said the problem is now fixed, but some flights are still running late as they get back to normal.
United is helping affected customers with expenses like hotels.
A technology issue caused widespread delays and cancellations for United Airlines flights.
The Unimatic system, which manages flight information, was the source of the problem.
Flights to several US hubs, including Chicago, Denver, and Newark, were affected.
Over 1,000 flights were delayed on Wednesday, with residual delays continuing into Thursday.
United Airlines is offering support to affected customers, including covering expenses.
- Who
- United Airlines and its passengers.
- What
- A technology issue caused flight delays and cancellations.
- When
- Wednesday, with residual delays continuing into Thursday.
- Where
- Multiple US airports, especially hubs such as Chicago, Denver, Newark, Houston and San Francisco.
- Why
- Due to a technology issue within the Unimatic system.
Airline Operations
Passenger Experience
Issue Resolution vs. Passenger Experience
Airline Operations
The airline resolved the underlying technology issue and is restoring normal operations.
Passenger Experience
Passengers experienced significant delays and disruptions.
- Airline
- United Airlines
- Issue Type
- Technology Issue
- Affected System
- Unimatic
- Impact
- Delays and Cancellations
- Delayed Flights
- 1,000+
- Date
- Wednesday
Sources
United Airlines Requests Ground Stop Over 'System Outage'. Here's The List Of Affected Airports
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United Airlines Outage: Video Shows Passenger Stuck On Tarmac Amid Ground Stop | Watch
Flyer chaos as United Airlines grounds all flights across US over tech failure
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United Airlines resolves tech problem that hit more than 1,000 flights, but residual delays likely