Aegean, the country's largest airline, and its subsidiary Olympic Air cancelled all of their flights in or out of the country for tomorrow, when the walkout is set to begin.
Irish budget airline Ryanair has grounded 110 flights scheduled for today and tomorrow, calling on the European Commission to take action "to prevent these repeated ATC strikes from continuously disrupting the travel plans of millions of Europe's citizens and their families".
The Greek air traffic controllers union on Wednesday said the 24-hour rolling strikes will continue on Monday, Wednesday and Thursday.
Greek Transport Minister Christos Spirtzis has accused the air traffic controllers' union of calling a "strike without precise demands" and "with political motives".
He stressed though that he is open to discuss with them.
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