THE QUICK TAKE
  • According to specialist outlet Simple Flying, a July 19, 2025 United outage in the SHARES reservation system disrupted check-in and boarding at major hubs for roughly 75 minutes — United has not confirmed this cause officially.
  • Aviation A2Z reported, and AP corroborated, that a separate August 6 United ground stop halted over 1,000 flights and was linked to Unimatic, a dispatch platform the outlet says dates to 1970.
  • A GAO review confirmed 34 airline IT outages over three years hit 11 of 12 major carriers examined, with 85% causing delays or cancellations, establishing this as an industry-wide pattern rather than a single carrier's problem.

What Folks Are Talking About

Well, butter my biscuit and call it a Tuesday — the aviation world has been buzzing louder than a hornet in a mason jar about U.S. airlines running critical operations on computer systems old enough to have a pension. The conversation got real hot in the summer of 2025, when a string of high-profile ground stops smacked United, Alaska, and American Airlines one right after the other, like dominoes falling down a kudzu-covered hill.

The chatter among industry watchers, analysts, and frustrated passengers is that these carriers have been slapping fresh paint on a barn that's been rotting at the foundation for decades — and now the whole structure is starting to lean in a way that can't be ignored. Analysts interviewed by outlets including AFAR Magazine and CNN have been raising the alarm that the pattern of failures points to something structural rather than a run of bad luck.

What Is Actually Known: A Summer of Ground Stops

Here's what's confirmed, sure as a catfish smells like a catfish: United Airlines had two separate, confirmed technology disruptions in 2025. Specialist outlet Simple Flying reported, citing a United confirmation, that a July 19 fault in the carrier's SHARES reservation system knocked out check-in, bag drop, boarding, and contact center operations at major hubs including Washington Dulles and Newark for roughly 75 minutes before things started crawling back to normal. United itself has not issued a detailed public root-cause statement on that one.

Then, on August 6, the situation got a whole lot uglier. Aviation A2Z reported, and the Associated Press corroborated via Yahoo News, that a separate failure — one the outlet linked to Unimatic, a dispatch and operations platform it described as dating back to 1970 — triggered a nationwide FAA ground stop. More than 1,000 United flights were delayed and dozens were outright canceled, with disruptions dragging into the following day, according to CBS News and the AP. United called it a 'technology issue' and noted it had no cybersecurity connection, but the airline did not publicly confirm Unimatic as the specific cause.

Those two United events didn't happen in a vacuum, either. As AFAR Magazine confirmed, the August 6 stoppage was the third major IT-caused ground stop at a large U.S. carrier in as many months: American Airlines had suffered a flight communications outage on June 27, and Alaska Airlines had experienced a software failure on July 20 that, according to Aerospace Global News, grounded its entire fleet of roughly 200 aircraft for about three hours. Three carriers, three different platforms, same ugly result.

What Analysts Say Is Causing This Mess

Now here's where the experts get to talking, and it sounds about like describing a possum that wandered into a Radio Shack and started chewing wires. Analysts interviewed by CNN and AFAR described airline IT architecture as a thicket of reservation platforms, crew-scheduling tools, weight-and-balance calculators, departure control systems, and maintenance databases — each one built at a different time, by a different vendor, and never engineered to talk nicely to its neighbors. NPR and Aerospace Global News both reported on this framing of an interconnected web that is extremely difficult to recover once any central node goes haywire.

Henry Harteveldt of Atmosphere Research Group told AFAR that software problems in the aviation sector occur far more often than anyone wants to admit, and he noted that no centralized system exists to track technology outages across the national aviation network. William McGee of the American Economic Liberties Project publicly raised the question, according to AFAR and CNN, of whether airlines are putting enough money into their technology infrastructure in the first place. Harteveldt, however, pushed back on a simple underinvestment story, telling CNN that carriers have been spending on technology — just not consistently targeting their oldest, most fragile components.

What Remains Unverified and Disputed

Hold your horses before declaring the whole barn on fire, because some important details are still murkier than a catfish pond in August. United has not issued any official statement naming Unimatic as the root cause of the August 6 outage; that identification comes from Aviation A2Z and was picked up by the AP, but it is not a company admission. Similarly, the July 19 SHARES attribution comes from Simple Flying citing a United confirmation, but United has not published a formal incident report.

There is also a genuine dispute in the analyst community about whether outage frequency has actually increased or whether the same old rate of failures is just getting more attention because passenger volumes are higher and media coverage is sharper. CNN included an analyst perspective suggesting the current pace may not be meaningfully worse than in prior years — just more visible. The causal chain between underinvestment and outage risk is argued by McGee but not universally accepted among the experts on record.

On the spending side, a vendor-published source, Mekari, citing SITA and IATA figures, claimed that total airline IT spending has reached $37 billion with most carriers forecasting more increases, yet also noted that IATA's own 2025 survey found roughly 43% of airlines still describe themselves as being at an early stage of data strategy — suggesting, according to that source, that dollars spent haven't yet closed the gap. Because Mekari is a vendor-adjacent publisher rather than an independent auditor, those figures should be treated with appropriate skepticism and are marked uncertain in this packet.

The GAO's Receipt: This Ain't a One-Airline Rodeo

If you need a government receipt to prove the barn's been leaking, the GAO provided one. A U.S. Government Accountability Office review — a primary source — confirmed 34 airline IT outages over a three-year span, found that 85% of those events caused flight delays or cancellations, and documented that failures struck 11 of the 12 major airlines it examined. The GAO also flagged that no consistent public reporting framework exists for airline technology disruptions, which limits what regulators and consumers can actually track or demand accountability for. That's a pattern too wide to pin on any single carrier's budget decisions.

Our Analysis: The Cycle Looks Likely to Continue

This is analysis, not reporting: the structural picture painted by independent analysts, the GAO, and multiple rounds of corroborating coverage suggests that without deliberate, funded replacement or hardening of core legacy platforms, the disruption cycle described above has no obvious reason to stop. Replacing systems as deeply embedded as dispatch and reservation platforms is roughly equivalent to swapping out the engine on a tractor while it's plowing — technically possible, eye-wateringly expensive, and easy to keep postponing when the thing is still turning over every morning.

The disagreement among analysts about whether frequency is rising or merely more visible actually matters less than it might seem: either way, the GAO data already established decades ago that the problem is real, systemic, and distributed across nearly every major carrier. The addition of a second major United incident, an Alaska grounding, and an American outage all within months of each other in 2025 suggests the pace is at minimum not improving. Whether airlines treat this summer's string of headlines as a fire alarm or as background noise they've learned to live with may be the most consequential technology management question in U.S. commercial aviation right now — and on that score, the industry's track record, per analysts on record with CNN, AFAR, and NPR, is not exactly inspiring confidence.

Who is doing the hollering

These links show where the chatter came from. A link is attribution, not our endorsement or independent confirmation.

  1. United Airlines flights delayed nationwide as tech outage hits check-in and boardingMSN / Simple Flying · specialist
  2. United Airlines Flights Delayed Nationwide As Tech Outage Hits Check-In And BoardingAerohaber / Simple Flying · specialist
  3. United Airlines Grounds Over 1,000 Flights After Major System OutageAviation A2Z · specialist
  4. United Airlines resolves tech issue that grounded flights, but travel disruptions continueYahoo News / Associated Press · top tier
  5. United Airlines ground stop lifted; flight delays persist in multiple cities, including ChicagoCBS News Chicago · top tier
  6. Why Airlines and Airports Are Still Having So Many Tech Problems in 2025AFAR Magazine · top tier
  7. IT outages are plaguing air travel. Here's what to knowCNN · top tier
  8. Why do airline computer systems fail? What the industry can learn from meltdownsNPR · top tier
  9. Alaska Airlines outage: Why do airlines IT systems keep failing?Aerospace Global News · specialist
  10. Commercial Aviation: Information on Airline IT OutagesU.S. Government Accountability Office · primary
  11. Airline Digital Transformation PlaybookMekari · specialist
Revision record

Last checked Jul 19, 2026, 9:08 PM EDT. Talk Around Town: United has not publicly identified the precise root cause of the July 19, 2025 outage; specialist outlet Simple Flying attributed it to the SHARES reservation system, not a United official statement. The Unimatic system was named by Aviation A2Z and corroborated by AP as the cause of the August 6 event, but United itself only called it a 'technology issue' unrelated to cybersecurity. Full financial impact and any replacement timeline remain unconfirmed.