Travelers across the United States experienced brief disruptions on Tuesday when United Airlines and Delta Air Lines encountered a technology issue that affected their online platforms. The problem, which appeared to be linked to a vendor system, prevented some customers from logging into their mileage accounts and caused delays at boarding gates.
United Airlines response
United issued a statement saying the airline “encountered a brief technology issue connected to a vendor that prevented customers from logging into their MileagePlus accounts.” The carrier added that the issue was resolved quickly and that there was “no impact to our flight operations.” United’s website and mobile app displayed a notice that the company was “working to fix a temporary technical issue affecting united.com and the United app.”
Delta Air Lines response
Delta confirmed it was also dealing with a limited global technology issue that affected data connectivity for some of its back‑end systems. The airline said its systems were stabilizing and thanked customers for their patience and understanding. No cancellations or major flight disruptions were reported as a result of the glitch.
Other carriers
Down Detector, a site that tracks service outages, indicated that American Airlines’ website and app experienced similar problems, though the airline did not comment on the situation. The airline’s lack of response leaves the extent of the issue unclear.
Background on airline IT outages
Airline technology networks are complex, combining in‑house systems with third‑party vendor services that many carriers share. While the exact cause of Tuesday’s outage remains unidentified, airlines have faced similar disruptions in recent years. In July, American Airlines halted flights for less than an hour due to an IT outage that briefly impacted connectivity. In August 2025, United experienced a technology issue that forced flight groundings, resulting in over 1,000 delays and dozens of cancellations. A notable 2024 incident involved a Microsoft Windows update from cybersecurity firm CrowdStrike that temporarily shut down systems for several airlines, including Delta, United, American Spirit, Frontier, Allegiant and Sun Country.
Impact on travelers
Social‑media posts from affected passengers described delays at boarding gates and difficulty accessing flight information through airline apps. While the disruptions were short‑lived, they highlighted the reliance of modern travel on seamless digital services. Both United and Delta emphasized that flight operations were not affected, and normal service resumed shortly after the technical fixes were applied.
Looking ahead
Industry experts note that as airlines continue to integrate more sophisticated digital tools, the risk of vendor‑related glitches may increase. Ongoing investments in cybersecurity and system redundancy are essential to minimize future interruptions. Travelers are encouraged to stay informed through airline communications and to have alternative plans in case of unexpected technical issues.
Original reporting: KRDO (Colorado Springs metro) — read the source article.
