A technical failure at Swiss air navigation service provider Skyguide temporarily disrupted Swiss air traffic on Tuesday, forcing the organisation to halve capacity across Swiss airspace. Take-offs and landings at Zurich and Geneva airports were briefly interrupted, while airlines faced possible delays. After the fault was identified and repaired, Skyguide increased capacity to 80%, with full operations expected after a 24-hour stabilisation period.
The malfunction affected the system that generates the radar display used by air traffic controllers to monitor aircraft movements. Skyguide activated a crisis team and reduced capacity as a precaution, while maintaining that safety in Swiss airspace was assured. There was no indication of a cyberattack.
Operations at both airports resumed after the short interruption, although the temporary capacity restriction continued to affect traffic flows and could disrupt airline schedules and connecting passengers. The remaining 20% limitation was intended to confirm that the restored systems were operating reliably before normal capacity returned on Wednesday afternoon.
The incident follows several technical disruptions involving Skyguide during 2026, including earlier software- and equipment-related problems. The available reporting does not specify the number of delayed or cancelled flights, the failed technical component or the financial impact of Tuesday’s disruption.