This account treats the date above as the time of the underlying event, not as a publication date. It is confined to what the cited reporting established at that point. Details that were uncertain, attributed, provisional or still developing remain presented on those terms, and no later result is assumed.

What the reporting established

Authorities described the issue as a technical problem under investigation in cooperation with external providers. Operations began resuming gradually later in the day, though full restoration was not immediate.

The disruption began early Sunday morning, affecting thousands of passengers during a busy post-holiday travel period. Airports documented widespread delays and cancellations, with travelers advised to check with airlines for updates.

Flight tracking data showed Greece’s airspace largely empty, with many inbound flights diverted to neighboring countries such as Italy, Turkey and Cyprus. Overflights through the region were partially allowed in some cases.

The Hellenic Civil Aviation Authority issued a notice to airmen declaring a “zero rate” for flights in the Athens Flight Information Region due to communication frequency failures at the Athens and Macedonia Area Control Centers. Takeoffs and landings were halted at airports across Greece, including Athens International Airport, while aircraft already airborne were managed under emergency procedures.

ATHENS, GREECE (VINnews) — A major technical malfunction in Greece’s air traffic control radio frequency systems disrupted flights nationwide Sunday, leading authorities to impose severe restrictions on the country’s airspace. Join our WhatsApp group Subscribe to our Daily Roundup Email The Hellenic Civil Aviation Authority issued a notice to airmen declaring a “zero rate” for ATHENS, GREECE (VINnews) — A major technical malfunction in Greece’s air traffic control radio frequency systems disrupted flights nationwide Sunday, leading authorities to impose severe restrictions on the country’s airspace.

Scope of the record

The record is most useful when read as a contemporaneous snapshot. It identifies the central development, the people or institutions directly involved and the consequences described by the available reporting. Statements made by officials, witnesses or other parties are not converted into independent findings; their source and status remain material to understanding the account.

The evidence also sets limits on the conclusions that can safely be drawn. It does not support speculation about motives, responsibility or subsequent outcomes beyond what was explicitly reported. Figures and operational descriptions can be revised as fuller information emerges, so the numbers and characterisations here belong to the dated record rather than a final historical tally.