Hi
According to Travel Weekly UK, both companies have confrmed that they will stick to May17th to restart flights.
Read more:
https://travelweekly.co.uk/news/air/tui-and-easyjet-holidays-stick-to-may-17-restart-plans
All we need now is for Greece to sort out their vaccination programme, reduce the death rates and infections on the mainland and to get on the Green List
Keep safe
Geoff