Greece Radio Frequency Outage Disrupts Airspace And Flights Across The Country

The radio frequency outage in Greek airspace led to nationwide flight suspensions, airport operation restrictions, and diversions. Authorities are investigating the cause while airports work to restore normal traffic and safety measures are maintained.

Flights across Greece were brought to a sudden standstill on 4 January after a radio frequency problem disrupted communications, leaving Greek airspace largely empty and forcing nationwide suspensions of take-offs and landings while aviation authorities investigated the cause and imposed strict safety limits on airport operations.

Greece's civil aviation authority confirmed that the disruption affected radio frequencies used for air traffic control, prompting restrictions on airport activity, though some overflights crossing the Athens Flight Information Region continued under controlled conditions, while officials stressed that enquiries were under way to identify what triggered the outage.

Greek airspace disruption halts air traffic and airport operations

State broadcaster ERT reported that all arrivals and departures at airports across Greece stopped from 9:00 a.m. local time (0700 GMT), with footage from Eleftherios Venizelos International Airport in Athens showing crowded departure halls and stranded passengers as flight-tracking platforms displayed Greek airspace almost completely clear of commercial aircraft.

A Transport Ministry official told Reuters that more than 75 flights faced delays, although a limited number of aircraft travelling towards northern and eastern destinations received permission to depart, while several other services were diverted to nearby states as airlines adjusted routes to avoid affected Greek airspace.

Greek airspace failure triggers diversions and delays abroad

In Israel, an Airports Authority spokesperson said Greek airspace would remain closed until 4:00 p.m. local time (1400 GMT), warning travellers to expect delays to both arrivals and departures on routes linked to Greece, and advising passengers that the disruption could affect schedules throughout the region.

Greek City Times posted on X: "Security Check-In Closed Since 9 AM! Due to the ongoing radio frequency failure in Greek airspace (started early January 4, 2026), NO takeoffs possible nationwide. Security check-in & departures halted at Athens International since ~9 AM," capturing the scale of the shutdown in Greek airspace.

The same post added: "Massive queues building up, passengers stranded. Arrivals landing manually where possible, but many diversions/delays All Greek airports affected – FIR Athens effectively closed. Civil Aviation Authority rushing fixes, but no ETA yet. Airlines issuing alerts – expect huge delays/cancellations today," underlining the pressure on airports and airlines as the failure hit Greek airspace.

Authorities across Greece continued working with technical teams to restore full radio frequency services and normal traffic flows in Greek airspace, while passengers faced long queues, diversions and extended waiting times as safety restrictions stayed in place and officials assessed when airports could resume standard operations.