28 days ago · Global
'Millisecond' software error caused air traffic outage that grounded thousands of flights
What's happening
SignalsMonitor is following this as a conflict story. The Guardian World, BBC Business, and Sky News UK are the outlets attached to this story. The reports are tied to Global. The first report grouped here was at 18 Sept 2026, 12:39 UTC. 8 material updates are listed in the timeline. The headline in use is “'Millisecond' software error caused air traffic outage that grounded thousands of flights”. This note is SignalsMonitor's own briefing, not the publisher's article.
What we know
The air traffic outage that grounded thousands of flights was not caused by a 'military operation' but by a software problem that happened in a millisecond, an investigation found.
Story timeline
Reports grouped into this story, earliest first. Exact repeats from the same outlet are collapsed.
- First reported by Sky News UK
'Millisecond' software error caused air traffic outage that grounded thousands of flights
- New development reported by BBC Business
Software glitch caused travel chaos, says air traffic control body
- Picked up by BBC Business
Flight chaos caused by software defect, says air traffic control body
- New development reported by BBC Business
Flight chaos caused by software defect in the 'space of a millisecond', report says
- Picked up by The Guardian World
Flight chaos affecting hundreds of thousands was caused in ‘millisecond’ by software error
- Picked up by The Guardian World
Flight chaos affecting hundreds of thousands caused in ‘millisecond’ by software error
- Picked up by The Guardian UK
Flight chaos for hundreds of thousands was caused in ‘millisecond’ by software error
- Picked up by BBC News UK
Flight chaos caused by 'millisecond' software defect, report says
Same story, different outlets
3 headlinesEach line is that outlet's headline. The article stays on the publisher's site.