United Airlines Resumes Flights, Blames Internal Glitch for Delays

United Airlines Resumes Flights, Blames Internal Glitch for Delays
Above: United Airlines planes at San Francisco International Airport (SFO) in California on Aug. 6, 2025. Image credit: Tayfun Coskun/Anadolu/Getty Images

The Facts

  • United Airlines grounded all mainline flights nationwide on Wednesday evening starting at 6:12 p.m. ET due to a technology issue affecting the airline's Unimatic system, which stores flight data and feeds information to other systems, including weight and balance calculations.
  • The outage lasted for several hours and prompted ground stops at major United hub airports, including Chicago, Denver, Houston, Newark and San Francisco, according to the Federal Aviation Administration's website and system status updates.
  • Flight tracking data from FlightAware showed that over 1,000 United flights were delayed on Wednesday, representing approximately 34-35% of the airline's scheduled flights.

Sources Split


The Spin


Narrative A

While this was certainly a pain for travelers, it was swiftly resolved. Air travel remains remarkably safe, with zero U.S. commercial passenger airline fatalities remaining very small despite billions of passengers, thanks to robust safety systems and pilot training. Delays are inconvenient, but the industry's safety record and ongoing modernization prove air travel's outstanding record.

Narrative B

While air travel remains broadly reliable, something has clearly gone wrong this year, as shown by the mid-air crash in Washington, D.C., that killed 67. Safety gaps include outdated WWII-era control systems and hazardous mixed airspace. Strained government resources weaken safety oversight, requiring innovative solutions, like airlines loaning expert inspectors for rotations, to enhance efficiency and prevent future tragedies.


Metaculus Prediction


The Controversies


© 2026 Improve the News Foundation. All rights reserved.Version 7.18.0

© 2026 Improve the News Foundation.

All rights reserved.

Version 7.18.0