Aegean and Sky Express have launched discount offers across their networks today.
For Aegean, bookings must be made by September 2 (midnight Greek time) for flights between September 15, 2026, and March 31, 2027.
https://en.aegeanair.com/flight-deals/offers-competitions/flights-to-all-network/
For Sky Express, bookings must be made by September 10 (midnight Greek time) for flights between September 22, 2026, and March 10, 2027.
https://www.skyexpress.gr/en/flights-up-to-fifty-percent-off-august26
This is for information purposes only; I have no commercial relationship with these airlines. Don't forget to read the terms and conditions.