Overview
- Arrivals and departures were suspended across Greece after failures in radio-frequency systems serving the Athens and Macedonia area control centers.
- Greek airspace was declared closed until 16:00 local time, with a temporary directive permitting only overflights.
- Flights were diverted to neighboring countries and travelers encountered extensive delays during a busy post-holiday travel period.
- The Hellenic Civil Aviation Authority is investigating in coordination with external agencies, with preliminary reports noting a circuit failure and the root cause still unclear.
- By the afternoon, operations were being gradually restored and some landings used non-automated procedures, according to local media.