Airport Tech Glitches Snarl Flights From San Diego to UK

Air travelers across several regions are facing mounting delays this week as a series of unrelated technology glitches disrupt airport check-in systems, passport kiosks and air traffic control infrastructure from California to the United Kingdom.

San Diego Check-In Meltdown Triggers Long Lines

Operations at San Diego International Airport were heavily disrupted on the morning of September 22, 2026, after a widespread IT failure affected check-in and ticketing systems across both of the airport’s terminals. Publicly available local coverage indicates that the issue began at roughly 5:30 a.m. and knocked primary airline computer networks offline, forcing airlines to switch to manual and backup procedures.

Reports from regional broadcasters and airport updates describe dense crowds, slow processing and extensive queues stretching through the check-in halls as staff worked with reduced system functionality. Passengers were advised to arrive early and verify flight status directly with their carriers while delays rippled through the schedule and into the afternoon.

According to published accounts, the disruption primarily affected the processing of departing passengers, with airlines printing documents and rebooking customers using contingency methods. While there were no indications of a security issue, the outage highlighted how dependent modern airport operations are on integrated IT platforms that link airlines, ground handlers and airport management systems.

By later in the day, services were reported to be stabilizing, but residual delays continued as aircraft and crews remained out of position. Travelers with tight connections through other hubs were among the most affected, underscoring how a local outage can have wider network consequences.

Telecom Failure Adds Pressure at Northeast U.S. Hubs

The disruption in San Diego followed closely on the heels of a separate technical failure that affected air traffic along the U.S. Northeast corridor on September 21, 2026. According to national news coverage, a damaged fiber line serving a key Federal Aviation Administration facility triggered an equipment outage and prompted ground stops at several major airports, including Newark Liberty International, John F. Kennedy International and LaGuardia.

Flight-tracking data cited in media reports shows that Newark alone recorded dozens of cancellations and scores of delays into the following morning as airlines worked through backlogs. Although the damaged telecom links were repaired the same day, the knock-on impact continued as aircraft rotations and crew schedules were adjusted.

Coverage indicates that the issue was traced to a construction incident that severed air traffic control communications infrastructure. The event served as a reminder that even when primary systems are designed with redundancy, supporting networks such as power and fiber connections can represent single points of vulnerability for airport operations.

Travelers in the region were urged through airline and airport channels to monitor flight information closely and allow extra time at the airport as schedules gradually normalized. The disruption added to an already busy late-September travel period, compounding congestion at terminals that were otherwise operating normally.

UK Air Traffic Software Glitch Causes Cancellations

Across the Atlantic, the United Kingdom has been dealing with its own air traffic technology problems. A detailed report published last week on a National Air Traffic Services incident described how a previously unknown software defect in part of the UK’s air traffic control system corrupted flight data in a fraction of a second earlier in September.

According to that report and subsequent news analysis, the error set off a chain reaction that led to a six-hour shutdown of automated flight data processing and forced controllers to handle traffic manually. The result was approximately 2,000 flight cancellations and significant delays over several days, affecting hundreds of thousands of passengers across the UK and Europe.

Following that episode, a second technical issue at a NATS facility in Prestwick in Scotland was reported on September 21, 2026. Media coverage indicates that the latest glitch was resolved more quickly but still resulted in cancellations and delays for flights in and out of Scotland, Northern Ireland and parts of northern England for much of the day.

Transport briefings and press reports in the UK have emphasized that safety margins were maintained throughout both incidents, but they have also prompted renewed scrutiny of legacy systems and update cycles inside air navigation services. The events have fueled public debate about whether current levels of investment in air traffic technology are adequate for the volume of flights handled.

Passenger Screening and Border Systems Also Under Strain

Check-in and air traffic systems are not the only aviation technologies under pressure. In Canada, a separate outage on September 11, 2026, affected Canada Border Services Agency passport inspection kiosks at several airports, including Toronto Pearson and Montreal–Trudeau. Industry-focused coverage describes long lines in arrivals halls as kiosks went offline and officers processed passengers manually for several hours before systems were restored.

Reports indicate that similar kiosk disruptions have occurred on previous occasions, prompting CBSA to review the causes and publicly reiterate that there was no evidence of cyberattack involvement. The repeated incidents highlight how automated border control technologies, introduced to speed up processing and reduce staffing pressures, can create bottlenecks when they fail.

In the United States, recent local coverage from Hawaii described hours-long delays at Lihue Airport on Kauai earlier this month after intermittent power problems affected screening equipment. With generators cycling on and off under high demand, Transportation Security Administration screening checkpoints had to be reset multiple times, resulting in queues that some passengers reported lasted up to seven hours.

These episodes, while localized, illustrate the broader challenge of keeping airport screening and border management hardware resilient during power fluctuations, surges in passenger numbers or software updates. Congressional documents and oversight reports in recent years have also pointed to recurring outages in checked baggage explosives detection systems, urging tighter maintenance standards and reliability targets.

Airlines and Tech Providers Confront Global GPS and IT Issues

Beyond airports and air traffic centers, aircraft avionics and airline IT platforms have also faced technical headwinds this month. On September 22, 2026, Brazilian carrier Azul reported interruptions to operations of its Embraer E195-E2 fleet for nearly three hours due to a GPS reception issue affecting onboard systems. Aviation industry reporting indicates that the aircraft manufacturer and avionics supplier are investigating a problem with the reception of satellite navigation signals and assessing its global scope.

Although safety was not reported to be compromised, the incident led to cancellations and delays across the airline’s network, adding a further example of how complex interactions between software, satellite constellations and aircraft equipment can ripple through passenger itineraries.

At the same time, status pages and incident logs from various travel-technology providers in September show intermittent outages or degraded performance affecting reservation and distribution systems that connect airlines, online travel agencies and corporate booking tools. While many of these events are brief and resolved within hours, they can increase call center loads and complicate rebooking efforts during larger disruptions like those seen in San Diego or the UK.

For travelers, the common thread in these incidents is increased uncertainty at the airport, longer processing times and a greater need to rely on real-time information from airlines and airports. For operators, the recent wave of glitches is sharpening focus on backup procedures, cross-industry coordination and the resilience of the digital infrastructure that underpins global air travel.