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Radio frequency loss grounds flights in Greece, stranding thousands

FLIGHTRADAR24.COM
FLIGHTRADAR24.COM
Jan 4, 2026
A flight radar map shows almost empty airspace over Greece, after airports across Greece suspended arrivals and departures due to unspecified issues affecting radio frequencies, according to the Greek aviation authority, in this screengrab obtained from the internet on January 4, 2026. FLIGHTRADAR24.COM via REUTERS
A flight radar map shows almost empty airspace over Greece, after airports across Greece suspended arrivals and departures due to unspecified issues affecting radio frequencies, according to the Greek aviation authority, in this screengrab obtained from the internet on January 4, 2026. FLIGHTRADAR24.COM via REUTERS — FLIGHTRADAR24.COM

Jan 4 (Reuters) - Flights across Greece were grounded on Sunday after a collapse of radio frequencies crippled air traffic communication, stranding thousands of travellers and bringing airport operations to a halt.

There was little clarity on what caused the disruption, which began early Sunday and quickly escalated. Some overflights across Greek and regional airspace were still being serviced, but restrictions were imposed on airport operations for safety reasons, Greece's civil aviation authority said.

Dozens of flights were disrupted. "For some reason all frequencies were suddenly lost .. We could not communicate with aircraft in the sky," Panagiotis Psarros, chair of the Association of Greek Air Traffic Controllers, told state broadcaster ERT.

He said the problem seemed to be a collapse of centralradio frequency systems at the Athens and Macedonia area control systems, the largest air control facility in the country based in Athens. It monitors the Athens Flight Information Region, a vast expanse of airspace under the control of Greek authorities.

Flight trackers showed Greek airspace was largely empty. ERT said airport arrivals and departures were suspended at 9 a.m. local time (0700 GMT), reporting from a departures terminal at Athens' Eleftherios Venizelos airport crowded with travellers.

"We haven't been informed about the cause of this problem... certainly the equipment we have is virtually ancient. We have raised this many times in the past," Psarros said.

A Transport Ministry official told Reuters some aircraft heading north and east were allowed to leave. More than 75 flights were delayed, the official said.

In Israel, an Airports Authority spokesperson said Greek airspace had been closed until 4 p.m. local time (1400 GMT), advising travellers to expect delays in arrivals and departures.

(Reporting by Michele Kambas; Additional reporting by Steven Scheer in Israel, Renee Maltezou and Lefteris Papadimas; Editing by Hugh Lawson and Ros Russell)